Revert "Commenting out Android keystore files"

This reverts commit 77145f787f311efa66c570c5ffadea10a429bf21.

Android.gitignore

@@ -52,9 +52,8 @@ captures/
 .idea/navEditor.xml
 
 # Keystore files
-# Uncomment the following lines if you do not want to check your keystore files in.
-#*.jks
-#*.keystore
+*.jks
+*.keystore
 
 # External native build folder generated in Android Studio 2.2 and later
 .externalNativeBuild