gralloc4: Defer metadata mmap and remove metadata vaddr from handle

Fix: 213170949
Fix: 290275019
Test: Boot to home
Test: VtsHalGraphicsMapperV4_0TargetTest
Test: aion_test
Merged-In: I559bb9081bc51fdf2d304b5cde17ac4f8cf1e138
Change-Id: I559bb9081bc51fdf2d304b5cde17ac4f8cf1e138
13 files changed