Gralloc: Use handle reserved size while importing buffer am: af82c80bda am: 75c033b8fb

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/qcom/sm8150/display/+/22422376

Change-Id: I4045da98b0b6c3ea124764c013e01f1afa164afd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>