Enable AAUDIO driver for Android

I thought this was already enabled for 2.0.16, but apparently not.

Fixes https://github.com/libsdl-org/SDL/issues/3710

CMakeLists.txt

@@ -1010,7 +1010,7 @@ if(ANDROID)
     find_library(ANDROID_OPENSLES_LIBRARY OpenSLES)
     list(APPEND EXTRA_LIBS ${ANDROID_DL_LIBRARY} ${ANDROID_OPENSLES_LIBRARY})
 
-    set(SDL_AUDIO_DRIVER_AAUDIO 0)
+    set(SDL_AUDIO_DRIVER_AAUDIO 1)
     file(GLOB AAUDIO_AUDIO_SOURCES ${SDL2_SOURCE_DIR}/src/audio/aaudio/*.c)
     set(SOURCE_FILES ${SOURCE_FILES} ${AAUDIO_AUDIO_SOURCES})