Adjust compiler warning options with the offdevice Makefile

Make use of AK_FORCE_INLINE for -Winline and better performance

Change-Id: If0016e2ef61c1fe007c83bb1a5133a6b6bde568e
diff --git a/native/jni/Android.mk b/native/jni/Android.mk
index 69a9aa9..da05894 100644
--- a/native/jni/Android.mk
+++ b/native/jni/Android.mk
@@ -28,7 +28,9 @@
 
 LOCAL_C_INCLUDES += $(LATIN_IME_SRC_FULLPATH_DIR) $(LATIN_IME_SRC_FULLPATH_DIR)/gesture
 
-LOCAL_CFLAGS += -Werror -Wall -Wextra -Weffc++ -Wno-system-headers
+LOCAL_CFLAGS += -Werror -Wall -Wextra -Weffc++ -Wformat=2 -Wcast-qual -Wcast-align \
+    -Wwrite-strings -Wfloat-equal -Wpointer-arith -Winit-self -Wredundant-decls \
+    -Winline -Wno-system-headers
 
 # To suppress compiler warnings for unused variables/functions used for debug features etc.
 LOCAL_CFLAGS += -Wno-unused-parameter -Wno-unused-function