Added storage provider sample to build script, updated MediaRecorder's build.gradle for emitBrowseable

Change-Id: I45b6d770905a8059e0b24fabfe3b250691bd87a0
diff --git a/build.gradle b/build.gradle
index b895091..ad075e4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -7,10 +7,12 @@
 "content/multiuser/AppRestrictions",
 "content/contacts/BasicContactables",
 "content/documentsUi/StorageClient",
+"content/documentsUi/StorageProvider",
 "views/TextLinkify",
 "input/gestures/BasicGestureDetect",
 "input/multitouch/BasicMultitouch",
 "testing/ActivityInstrumentation",
+"media/MediaRecorder",
 "media/BasicMediaRouter",
 "media/BasicMediaDecoder",
 "ui/holo/BorderlessButtons",