Add frontend constants and callback

Test: make; acloud;
Change-Id: I255aa05c9e0dddc261bb92982fec82355a6021b7
diff --git a/media/jni/Android.bp b/media/jni/Android.bp
index a596d89..3742f97 100644
--- a/media/jni/Android.bp
+++ b/media/jni/Android.bp
@@ -132,6 +132,7 @@
     shared_libs: [
         "android.hardware.tv.tuner@1.0",
         "libandroid_runtime",
+        "libhidlbase",
         "liblog",
         "libutils",
     ],