Support mimeType filter for getCategories

Bug: 169737761
Test: atest ItemsProviderTest
Change-Id: Ia6b12a4e1615325245646ddd07de8e3edb84d917
Merged-In: Ia6b12a4e1615325245646ddd07de8e3edb84d917
(cherry picked from commit 34e6c0b6955fa048ba62fb622ea6964ba68c84a0)
3 files changed