Add a method enable encryption.

This is for testing and needs to be cleaned up.

Change-Id: I71cd5412f7096dc13d9ab61229ee9846c6f0006a
diff --git a/libs/storage/IMountService.cpp b/libs/storage/IMountService.cpp
index a7ab824..7fbf67a 100644
--- a/libs/storage/IMountService.cpp
+++ b/libs/storage/IMountService.cpp
@@ -49,6 +49,7 @@
     TRANSACTION_getMountedObbPath,
     TRANSACTION_isExternalStorageEmulated,
     TRANSACTION_decryptStorage,
+    TRANSACTION_encryptStorage,
 };
 
 class BpMountService: public BpInterface<IMountService>
@@ -505,7 +506,7 @@
         path = reply.readString16();
         return true;
     }
-    
+
     int32_t decryptStorage(const String16& password)
     {
         Parcel data, reply;
@@ -522,6 +523,23 @@
         }
         return reply.readInt32();
     }
+
+    int32_t encryptStorage(const String16& password)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(IMountService::getInterfaceDescriptor());
+        data.writeString16(password);
+        if (remote()->transact(TRANSACTION_encryptStorage, data, &reply) != NO_ERROR) {
+            LOGD("encryptStorage could not contact remote\n");
+            return -1;
+        }
+        int32_t err = reply.readExceptionCode();
+        if (err < 0) {
+            LOGD("encryptStorage caught exception %d\n", err);
+            return err;
+        }
+        return reply.readInt32();
+    }
 };
 
 IMPLEMENT_META_INTERFACE(MountService, "IMountService");