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

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

Change-Id: I6d82642f3d6ddd60792a7cd604cfe7115bde9004