Make sendHint private in platform

 * Convert PerformanceHintManager sendHint to a private API
 * Have HWUI depend on private implementation

Bug: b/261640114
Test: atest PerformanceHintNativeTestCases
Test: atest FrameworksCoreTests:android.os.PerformanceHintManagerTest

Change-Id: I9d13f1eaff856dc3d38de5f6c1b5cf92a75f6ec3
2 files changed