[Magnifier - 7] Minor cleanup

Remove uselsess annotations on primitives.

Bug: 63531115
Test: bit FrameworksCoreTests:android.widget.TextViewActivityTest
Test: bit CtsWidgetTestCases:android.widget.cts.TextViewTest
Test: manual test that shows the magnifier working
Change-Id: I1e15e18d57af23d25a347d644ea57372e32adb59
1 file changed