Merge "Make MemoryDealer::deallocate private" am: cdb2c8f355 am: ebae424d21 am: 0afddfe2d7 am: edc1b777c8

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1843873

Change-Id: I46ef938a2b0222fa57b86a7b6836c2e42ae0bd12