Merge "Enable vendor variant of libgif static library" am: 8697006065 am: 119800dda5 am: 35c48f1948

Original change: https://android-review.googlesource.com/c/platform/external/giflib/+/2309527

Change-Id: I3c3c64086a5337d5f8e8ebb5c726da63b40e7bbe
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>