Change how Java Bitmaps are accessed in a few places

Stop assuming that a Java Bitmap has a SkBitmap* that
has some externally managed lifecycle, and instead switch
a bunch of users to accessing the bitmap by providing
their own SkBitmap* on which to set the (ref counted!)
SkPixelRef* instead

Attempt #2 to land this, original issue was in getSkBitmap
and should be fixed

Change-Id: I0fd9e193968b41e5597784140d56b4885906864a
diff --git a/core/jni/com_google_android_gles_jni_EGLImpl.cpp b/core/jni/com_google_android_gles_jni_EGLImpl.cpp
index 7080e2a..baeb7dd 100644
--- a/core/jni/com_google_android_gles_jni_EGLImpl.cpp
+++ b/core/jni/com_google_android_gles_jni_EGLImpl.cpp
@@ -277,8 +277,9 @@
     EGLConfig  cnf = getConfig(_env, config);
     jint* base = 0;
 
-    SkBitmap const * nativeBitmap = GraphicsJNI::getSkBitmap(_env, native_pixmap);
-    SkPixelRef* ref = nativeBitmap ? nativeBitmap->pixelRef() : 0;
+    SkBitmap nativeBitmap;
+    GraphicsJNI::getSkBitmap(_env, native_pixmap, &nativeBitmap);
+    SkPixelRef* ref = nativeBitmap.pixelRef();
     if (ref == NULL) {
         jniThrowException(_env, "java/lang/IllegalArgumentException", "Bitmap has no PixelRef");
         return;
@@ -289,10 +290,10 @@
 
     egl_native_pixmap_t pixmap;
     pixmap.version = sizeof(pixmap);
-    pixmap.width  = nativeBitmap->width();
-    pixmap.height = nativeBitmap->height();
-    pixmap.stride = nativeBitmap->rowBytes() / nativeBitmap->bytesPerPixel();
-    pixmap.format = convertPixelFormat(nativeBitmap->colorType());
+    pixmap.width  = nativeBitmap.width();
+    pixmap.height = nativeBitmap.height();
+    pixmap.stride = nativeBitmap.rowBytes() / nativeBitmap.bytesPerPixel();
+    pixmap.format = convertPixelFormat(nativeBitmap.colorType());
     pixmap.data   = (uint8_t*)ref->pixels();
 
     base = beginNativeAttribList(_env, attrib_list);