Android: Multiple fixes

- Fix possible crash when applying settings worker thread (no JNIEnv).
 - Fix settings not applying until restarting the app.
 - Support analog controller - auto-binding of axixes. Currently no
   touchscreen controller for the joysticks.
 - Add option to auto-hide the touchscreen controller.

android/app/src/cpp/CMakeLists.txt

@@ -3,7 +3,6 @@ set(SRCS
   android_host_interface.h
   android_settings_interface.cpp
   android_settings_interface.h
-  main.cpp
 )
 
 add_library(duckstation-native SHARED ${SRCS})