MediaSession2: Add CommandGroup#add/removeCommand(int)

Bug: 74648408
Test: Build
Change-Id: Icfcde5946e75ad74c2123be8064eb365366f5960
diff --git a/media/java/android/media/MediaSession2.java b/media/java/android/media/MediaSession2.java
index d902671..4437cca 100644
--- a/media/java/android/media/MediaSession2.java
+++ b/media/java/android/media/MediaSession2.java
@@ -519,6 +519,10 @@
             mProvider.addCommand_impl(command);
         }
 
+        public void addCommand(int commandCode) {
+            // TODO(jaewna): Implement
+        }
+
         public void addAllPredefinedCommands() {
             mProvider.addAllPredefinedCommands_impl();
         }
@@ -527,6 +531,10 @@
             mProvider.removeCommand_impl(command);
         }
 
+        public void removeCommand(int commandCode) {
+            // TODO(jaewan): Implement.
+        }
+
         public boolean hasCommand(@NonNull Command command) {
             return mProvider.hasCommand_impl(command);
         }