Merge "getDmabufMappedSizeKb: Use ReadDmaBufMapRefs()" am: 36f5f53a61

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1622159

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I67afcf295241c4ef183a3d0eae5f23535839290c