libgralloctypes: remove AIDL comparison operators am: 1e22dc10fc am: 57c22de5b2

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1519810

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I491088334fb4776a574337532c7c9c315b6a3dde