misc: Update .gitignore to exclude deployment target selector

Excludes the `deploymentTargetSelector.xml` file from being tracked by Git.

Author: static-var

.gitignore

@@ -54,6 +54,7 @@ captures/
 .idea/dictionaries
 .idea/libraries
 .idea/jarRepositories.xml
+.idea/deploymentTargetSelector.xml
 # Android Studio 3 in .gitignore file.
 .idea/caches
 .idea/modules.xml