Similar to shared/app_install_debug.sh but allows to downgrade version code and re-install w/o losing app data.

Shell command is adb install -r -d path/to/your_app.apk

APK should be app-android/build/outputs/apk/debug/*.apk

If APK file missing, should run ./gradlew assembleDebug to make one.

Like shared/app_clear_data_debug.sh, should commons/commons.sh and commons/adb_setup.sh to verify adb is ready.