[RNG] Bitmap::allocateHardwareBitmap() must copy source content.

Merge android12-hostruntime-dev 25874ec in master-layoutlib-native.

The RNG version of Bitmap::allocateHardwareBitmap() is implemented on
top of Bitmap::allocateHeapBitmap(). However, per the class comment
description, this factory method should also copy the content of the
source bitmap into the newly allocated bitmap. That is needed to make
"hardware" bitmaps work with RNG.

Flag: EXEMPT HOST_ONLY
Bug: 310222823,242670053
Test: m -j libandroid_runtime dist
Change-Id: Iddb33172ce95f93f76ebe4733cbbd88a04efefe2