Fix AnimatedImageDrawables using ByteBuffers

Bug: 140715166
Test: I56dc6e9865c2701746c95ea584bcc70fe4d62a6c

AnimatedImageDrawable, when created from a ByteBuffer, needs to get a
pointer to the JNI interface in order to read the ByteBuffer (or
byte[]). But the AnimatedImageThread is not attached to the JVM. Attach
it as necessary.

Change-Id: I51b69b5b70f8c5865d5e5ed065e42267fa556202
Merged-In: I51b69b5b70f8c5865d5e5ed065e42267fa556202
(cherry picked from commit a7ec12f7)