Resiliency in restoration of partially-corrupted backups

[t-m-w]

When restoring an application's user data from a partially-corrupted backup, when a file with a wrong hash is encountered, the process appears to hang indefinitely (spinner next to the failing app). Perhaps it can be handled so the process can proceed.

logcat snippet

11-14 10:44:07.783 10174  2994 13779 D o.c.s.c.b.s.SafBackend: [binder:2994_C       ] load(Blob(repoId=dff3948cc16136325ec200a8611c15d06134881f6b9d28dbd2e67157975f0f41, name=7946e6940d23de52692533ca9a37e2d7514f32a0d3a43a9f1a373af9f75e7596))
11-14 10:44:07.807 10189  2712  2888 I MediaProvider: Open with lower FS for /storage/emulated/0/.SeedVaultAndroidBackup/dff3948cc16136325ec200a8611c15d06134881f6b9d28dbd2e67157975f0f41/79/7946e6940d23de52692533ca9a37e2d7514f32a0d3a43a9f1a373af9f75e7596. Uid: 10107
11-14 10:44:07.812 10174  2994 13779 E JavaBinder: *** Uncaught remote exception! Exceptions are not yet supported across processes. Client PID 0 UID 1000.
11-14 10:44:07.812 10174  2994 13779 E JavaBinder: com.stevesoltys.seedvault.repo.HashMismatchException: File had wrong SHA-256 hash: 7946e6940d23de52692533ca9a37e2d7514f32a0d3a43a9f1a373af9f75e7596
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at com.stevesoltys.seedvault.repo.Loader.loadFromStream(Loader.kt:86)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at com.stevesoltys.seedvault.repo.Loader.loadFile(Loader.kt:47)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at com.stevesoltys.seedvault.repo.Loader.loadFile$default(Loader.kt:42)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at com.stevesoltys.seedvault.repo.Loader$loadFiles$enumeration$1$nextElement$1.invokeSuspend(Loader.kt:68)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:108)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:280)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:85)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source:1)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source:1)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at com.stevesoltys.seedvault.repo.Loader$loadFiles$enumeration$1.nextElement(Loader.kt:68)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at com.stevesoltys.seedvault.repo.Loader$loadFiles$enumeration$1.nextElement(Loader.kt:60)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at java.io.SequenceInputStream.peekNextStream(SequenceInputStream.java:102)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at java.io.SequenceInputStream.nextStream(SequenceInputStream.java:97)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at java.io.SequenceInputStream.read(SequenceInputStream.java:203)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at java.io.InputStream.read(InputStream.java:218)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at com.stevesoltys.seedvault.transport.restore.FullRestore.copyInputStream(FullRestore.kt:194)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at com.stevesoltys.seedvault.transport.restore.FullRestore.getNextFullRestoreDataChunk(FullRestore.kt:163)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at com.stevesoltys.seedvault.transport.restore.RestoreCoordinator.getNextFullRestoreDataChunk(RestoreCoordinator.kt:435)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at com.stevesoltys.seedvault.transport.ConfigurableBackupTransport$getNextFullRestoreDataChunk$1.invokeSuspend(ConfigurableBackupTransport.kt:219)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:108)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:280)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:85)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source:1)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source:1)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at com.stevesoltys.seedvault.transport.ConfigurableBackupTransport.getNextFullRestoreDataChunk(ConfigurableBackupTransport.kt:218)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at android.app.backup.BackupTransport$TransportImpl.getNextFullRestoreDataChunk(BackupTransport.java:954)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at com.android.internal.backup.IBackupTransport$Stub.onTransact(IBackupTransport.java:820)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at android.os.Binder.execTransactInternal(Binder.java:1505)
11-14 10:44:07.812 10174  2994 13779 E JavaBinder:      at android.os.Binder.execTransact(Binder.java:1444)
11-14 10:44:07.812 10174  2994 13779 I IPCThreadState: oneway function results for code 25 on binder at 0xb400007ac26fa0e0 will be dropped but finished with status UNKNOWN_TRANSACTION

[grote]

HashMismatchException gets introduced in #785 so this issue isn't affect current android15 branch. Will add a fix to the PR.