Gralloc: Use handle reserved size while importing buffer am: 0667ff33b2 am: 4227a2401a am: 080903de25 am: 388ef97fa8

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

Change-Id: Iff1f00467632578be0001e5a8544a36bd6579359
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>