Make RcsMessageStore a top level API

RcsManager was handling both DB APIs and RcsFeature logic, which
made it confusing. Instead, make RcsMessageStore->RcsMessageManager,
which is a top level API.

Test: Manual
Change-Id: I9b9f96154d0705797cedade3d6cee27719897164
diff --git a/Android.bp b/Android.bp
index 0d2caff..ca066a0 100644
--- a/Android.bp
+++ b/Android.bp
@@ -507,7 +507,7 @@
         "telephony/java/android/telephony/ims/aidl/IImsServiceController.aidl",
         "telephony/java/android/telephony/ims/aidl/IImsServiceControllerListener.aidl",
         "telephony/java/android/telephony/ims/aidl/IImsSmsListener.aidl",
-        "telephony/java/android/telephony/ims/aidl/IRcs.aidl",
+        "telephony/java/android/telephony/ims/aidl/IRcsMessage.aidl",
         "telephony/java/android/telephony/mbms/IMbmsDownloadSessionCallback.aidl",
         "telephony/java/android/telephony/mbms/IMbmsStreamingSessionCallback.aidl",
         "telephony/java/android/telephony/mbms/IMbmsGroupCallSessionCallback.aidl",