Gralloc: Use handle reserved size while importing buffer am: 0667ff33b2

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/qcom/sm7250/display/+/22451810

Change-Id: If79b7479909e7ed6c94b5597b9d726437d8ba945
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>