Add cpp native headers for IPowerManager.aidl parcelables.

Expose IPowerManager.aidl to native libpowermanager to generate
native cpp source files, and add native headers to parcelables used
by IPowerManager.aidl.

Bug: 149479744
Test: atest PowerManagerServiceTest

Change-Id: I0d74a457806f4937c8e17f52de453b3205dd3600
diff --git a/Android.bp b/Android.bp
index 9abc179..dc3733b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -478,6 +478,7 @@
         "core/java/android/os/IThermalEventListener.aidl",
         "core/java/android/os/IThermalStatusListener.aidl",
         "core/java/android/os/IThermalService.aidl",
+        "core/java/android/os/IPowerManager.aidl",
     ],
     path: "core/java",
 }