Fix drm aidl listeners

This is a part of change to fix cts test issue on drm framework by using clearkey aidl as the backend plugin.

Test: atest
CtsMediaDrmTestCases: android.media.drm.cts.NativeMediaDrmClearkeyTest#testClearKeyPlaybackCenc
Bug: 206804036
Change-Id: I2ad8a863dc1804e74d0fc40b933473546ed39b4a
diff --git a/drm/libmediadrm/Android.bp b/drm/libmediadrm/Android.bp
index bf0cdd5..408d216 100644
--- a/drm/libmediadrm/Android.bp
+++ b/drm/libmediadrm/Android.bp
@@ -34,6 +34,7 @@
         "CryptoHalHidl.cpp",
         "CryptoHalAidl.cpp",
         "DrmUtils.cpp",
+        "DrmHalListener.cpp",
     ],
 
     local_include_dirs: [