change build system to CMake and use SDL3 for everything

libs/SDL3/android-project/app/jni/src/Android.mk

@@ -0,0 +1,19 @@
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := main
+
+# Add your application source files here...
+LOCAL_SRC_FILES := \
+    YourSourceHere.c
+
+SDL_PATH := ../SDL  # SDL
+
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/$(SDL_PATH)/include  # SDL
+
+LOCAL_SHARED_LIBRARIES := SDL3
+
+LOCAL_LDLIBS := -lGLESv1_CM -lGLESv2 -lOpenSLES -llog -landroid  # SDL
+
+include $(BUILD_SHARED_LIBRARY)