Add Platform::Yield

Source/Engine/Platform/Android/AndroidPlatform.cpp

@@ -748,6 +748,11 @@ void AndroidPlatform::Sleep(int32 milliseconds)
     usleep(milliseconds * 1000);
 }
 
+void AndroidPlatform::Yield()
+{
+    pthread_yield();
+}
+
 double AndroidPlatform::GetTimeSeconds()
 {
     struct timespec ts;

Source/Engine/Platform/Android/AndroidPlatform.h

@@ -91,6 +91,7 @@ public:
     static void SetThreadPriority(ThreadPriority priority);
     static void SetThreadAffinityMask(uint64 affinityMask);
     static void Sleep(int32 milliseconds);
+    static void Yield();
     static double GetTimeSeconds();
     static uint64 GetTimeCycles();
     FORCE_INLINE static uint64 GetClockFrequency()