[automerger skipped] Rename getIonMappedSizeKb to getDmabufMappedSizeKb am: 6ae0be89b9 am: 8ce7111610 am: 6320b051a7 -s ours

am skip reason: Change-Id I5c19dc604cf48c3d7ccbfd2d9a83ddd7b35f20d5 with SHA-1 61ac2089d2 is in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1576749

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I5b139da93e450b712921d79e6fce3221f5424239