Mms: update new messages notification count

Mms should notify the system about how many new sms/mms has (including those ones under conversations)
to the notification system. This allow the system to display the number of events for Mms app according its
settings

Change-Id: I15953283ae657b770869f611a886452199550d67
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Mms: add MobilePaperShowActivity

This activity is from CAF, which allows incoming MMS messages which
appear as slide shows to be broken up into their separate images, while
still exposing the slideshow functinoality via an overflow menu button.

This helps alleviate the symptom of when an iPhone will send more than
one image in one MMS message and Mms app interpreting it as a slideshow
instead of separate images.

This commit is essentially a squash of:
https://www.codeaurora.org/cgit/quic/la/platform/packages/apps/Mms/log/src/com/android/mms/ui/MobilePaperShowActivity.java?h=LNX.LA.3.7.1&showmsg=1

Change-Id: I131a7b6203a071fc4adfc0efc80811a1e51aa995