Add mimetype filter to LocalImageResolver

Only allow "trusted" codecs

Test: LocalImageResolverTest
Bug: 456471290
Flag: EXEMPT BUGFIX

(cherry picked from commit e69ce2095f902a9f2ebd1871e9a0bda06908f0ab)
Cherrypick-From: https://googleplex-android-review.googlesource.com/q/commit:a420571a3e2428ea6578fbd2736c3fbf8e8b5b5a
Merged-In: Idafd13a01311f4966bd99c4a5de17b49bd0b8586
Change-Id: Idafd13a01311f4966bd99c4a5de17b49bd0b8586
3 files changed