gralloc4: Add RAW PlaneLayoutComponentType

RAW12 and RAW16 buffers need a PlaneLayoutComponentType. Add a RAW
type so vendors don't have to add private RAW types.

Test: VtsHalGraphicsMapperV4_0
Bug: 149869426

Change-Id: Idf1fa609e3a1506c3c87af22d4c548cf1218fad1

graphics/common/aidl/android/hardware/graphics/common/PlaneLayoutComponentType.aidl

@@ -41,6 +41,9 @@ enum PlaneLayoutComponentType {
     /* Blue */
     B = 1 << 12,
 
+    /* Raw */
+    RAW = 1 << 20,
+
     /* Alpha */
     A = 1 << 30,
 }