Update media-compat Android.mk to remove deleted directory.

Fixes FindEmulator: find: `frameworks/support/media-compat/jellybean-mr2':
No such file or directory

Test: None
Change-Id: I7be5df47ab9af8ce91c0d88742b51c7f24c2d46a
diff --git a/media-compat/Android.mk b/media-compat/Android.mk
index c660bc0..02ed90d 100644
--- a/media-compat/Android.mk
+++ b/media-compat/Android.mk
@@ -28,7 +28,6 @@
 LOCAL_SDK_VERSION := $(SUPPORT_CURRENT_SDK_VERSION)
 LOCAL_AIDL_INCLUDES := $(LOCAL_PATH)/java
 LOCAL_SRC_FILES := \
-    $(call all-java-files-under,jellybean-mr2) \
     $(call all-java-files-under,kitkat) \
     $(call all-java-files-under,api21) \
     $(call all-java-files-under,api22) \