Implement AndroidBitmap_getDataSpace

Bug: 135133301
Test: I7a5fcb726fba0c832bbb86a424d7534a7cfa35b6

This supplements AndroidBitmap_getInfo, allowing NDK clients to know how
to interpret the colors in an android.graphics.Bitmap.

Depends on I8e06071060ab19b103900ff04d60f1c3d3fccda9

Change-Id: Ie05a45da32b2fd670abdae35626cd6548cfb102c