[Bitmap] Add null pointer protection in Bitmap_sameAs()

Symptom: SkBitmap::getAddr(int, int) may return NULL due to unrecognized config 
(ex: kRLE_Index8_Config). This will cause memcmp method to crash. Since bm0 and 
bm1 both have pixel data() (have passed NULL == getPixels() check), those 2 
bitmaps should be valid (only unrecognized), we return JNI_FALSE to warn user 
those 2 unrecognized config bitmaps may be different.


Change-Id: I6970c27de412110a3035d0a783112c4cd3ebc35b
1 file changed