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