Set debuggable flag in Gradle debug build

So the debug build of the app can be debugged.

scripts/android/files/build.gradle

@@ -43,6 +43,7 @@ android {
 			proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
 		}
 		debug {
+			debuggable true
 			minifyEnabled false
 			shrinkResources false
 		}