Add special format detection for GIFs

Bug: 202396821
Test: atest SpecialFormatDetectorTest

Change-Id: Iafbaa51beb12e4188d1345cf811a42e0902e84e1
Merged-In: Iafbaa51beb12e4188d1345cf811a42e0902e84e1
(cherry picked from commit f2f6bc411e5cb5075fb1cb86ff9dfdfb03a3af8b)
3 files changed