Add FontManager#updateFontFamily() API.

Bug: 179103383
Test: atest CtsGraphicsTestCases:FontFamilyUpdateRequestTest
Test: atest CtsGraphicsTestCases:FontFileUpdateRequestTest
Test: atest CtsGraphicsTestCases:FontManagerTest
Test: atest FrameworksServicesTests:UpdatableFontDirTest
Test: atest UpdatableSystemFontTest
Change-Id: I0103784c72d60567675daf73e95e4d716f091e4a
11 files changed