Include Rect.h explictly

After freezing android.hardware.graphics.common, PlaneLayout.h doesn't
include Rect.h because header by redunant import is omitted.
(b/153527738)

So include Rect.h explictly

Test: m
Bug: 153510960
Change-Id: If513d1339452916d01b6571f0253d7da9fddea49
diff --git a/libs/gralloc/types/include/gralloctypes/Gralloc4.h b/libs/gralloc/types/include/gralloctypes/Gralloc4.h
index 5ec4d0d..8d12754 100644
--- a/libs/gralloc/types/include/gralloctypes/Gralloc4.h
+++ b/libs/gralloc/types/include/gralloctypes/Gralloc4.h
@@ -25,6 +25,7 @@
 #include <aidl/android/hardware/graphics/common/Interlaced.h>
 #include <aidl/android/hardware/graphics/common/PlaneLayout.h>
 #include <aidl/android/hardware/graphics/common/PlaneLayoutComponentType.h>
+#include <aidl/android/hardware/graphics/common/Rect.h>
 #include <aidl/android/hardware/graphics/common/Smpte2086.h>
 #include <aidl/android/hardware/graphics/common/StandardMetadataType.h>
 #include <aidl/android/hardware/graphics/common/XyColor.h>