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: Ic65eef1fbd1c26040e86ddf3cf7c59581fee4374
diff --git a/native/android/performance_hint.cpp b/native/android/performance_hint.cpp
index 40eb507..95b7513 100644
--- a/native/android/performance_hint.cpp
+++ b/native/android/performance_hint.cpp
@@ -263,14 +263,14 @@
     return session->reportActualWorkDuration(actualDurationNanos);
 }
 
-int APerformanceHint_sendHint(APerformanceHintSession* session, int32_t hint) {
-    return session->sendHint(hint);
-}
-
 void APerformanceHint_closeSession(APerformanceHintSession* session) {
     delete session;
 }
 
+int APerformanceHint_sendHint(void* session, int32_t hint) {
+    return reinterpret_cast<APerformanceHintSession*>(session)->sendHint(hint);
+}
+
 void APerformanceHint_setIHintManagerForTesting(void* iManager) {
     delete gHintManagerForTesting;
     gHintManagerForTesting = nullptr;