Service for reading and writing blocks to PST partition

Permits apps with permission
android.permission.ACCESS_PERSISTENT_PARTITION to obtain
a read and write data blocks to the PST partition.

Only one block ever exists at one time in PST. When
a client writes another block, the previous one is
overwritten.

This permits storing a block of data that will live
across factory resets.

Change-Id: I8f23df3531f3c0512118eb4b7530eff8a8e81c83
diff --git a/Android.mk b/Android.mk
index a7eb03d..5d957d0 100644
--- a/Android.mk
+++ b/Android.mk
@@ -210,6 +210,7 @@
 	core/java/android/service/dreams/IDozeHardware.aidl \
 	core/java/android/service/dreams/IDreamManager.aidl \
 	core/java/android/service/dreams/IDreamService.aidl \
+	core/java/android/service/persistentdata/IPersistentDataBlockService.aidl \
 	core/java/android/service/fingerprint/IFingerprintService.aidl \
 	core/java/android/service/fingerprint/IFingerprintServiceReceiver.aidl \
 	core/java/android/service/trust/ITrustAgentService.aidl \