Update sample app

Author: cketti

gradle.properties

@@ -15,4 +15,6 @@
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+android.enableJetifier=false
+android.useAndroidX=true
 org.gradle.parallel=true

sample/build.gradle

@@ -8,7 +8,7 @@ android {
         applicationId "de.cketti.safecontentresolver.sample"
 
         minSdkVersion 14
-        targetSdkVersion 23
+        targetSdkVersion 29
 
         versionCode 1
         versionName "1.0"
@@ -21,6 +21,6 @@ android {
 
 dependencies {
     implementation project(':SafeContentResolver-v14')
-    implementation 'com.android.support:appcompat-v7:23.2.0'
-    implementation 'com.squareup.okio:okio:1.6.0'
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'com.squareup.okio:okio:1.17.5'
 }

sample/src/main/java/de/cketti/safecontentresolver/sample/MainActivity.java

@@ -4,7 +4,7 @@
 
 import android.content.Intent;
 import android.net.Uri;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.os.Bundle;
 import android.view.View;
 import android.view.View.OnClickListener;

sample/src/main/java/de/cketti/safecontentresolver/sample/SampleApplication.java

@@ -6,6 +6,8 @@
 
 import android.app.Application;
 import android.content.Context;
+import android.os.Build;
+import android.os.StrictMode;
 
 import okio.BufferedSink;
 import okio.Okio;
@@ -19,9 +21,15 @@ public class SampleApplication extends Application {
     public void onCreate() {
         super.onCreate();
 
+        disableFileUriExposedException();
         createInternalFileIfNecessary();
     }
 
+    private void disableFileUriExposedException() {
+        // We're lazy and just disable all StrictMode.VmPolicy checks
+        StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder().build());
+    }
+
     private void createInternalFileIfNecessary() {
         File internalFile = getInternalFile(this);
         if (!internalFile.exists()) {

sample/src/main/java/de/cketti/safecontentresolver/sample/SampleContentProvider.java

@@ -10,7 +10,7 @@
 import android.content.res.AssetManager;
 import android.database.Cursor;
 import android.net.Uri;
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
 
 
 public class SampleContentProvider extends ContentProvider {

sample/src/main/java/de/cketti/safecontentresolver/sample/ShareReceiverActivity.java

@@ -7,7 +7,7 @@
 
 import android.content.Intent;
 import android.net.Uri;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.os.Bundle;
 import android.widget.TextView;