Hiding back AudioAttributes#usageToString(int)

Bug: 181015046
Test: atest CtsMediaTestCases:android.media.cts.AudioAttributesTest
Test: atest com.android.mediaframeworktest.unit.AudioAttributesUnitTest
Test: atest com.android.car.custominput.sample.unittest.CustomInputEventListenerTest
Change-Id: If6df2973c71ea92b2e948598db13691ad518cf13
3 files changed