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
Mms: Change message counter string for JA translation

Change-Id: Ie27e3791109b60f81de56fa9bf1dc8133fe19a0e
Automatic translation import

Change-Id: I6e3528f10c101eaee169c6febf4d1bb176ff2915
Automatic translation import

Change-Id: Ic1ead22e55cfd349461b790fcb08fbeac9d148db
Fix a crash when scrolling while a SMS is delayed.

Change-Id: I73f2d5f0e44dd80955db58e29ce1712cbf4e0ebb
Mms: Remove white background on the timestamp

The current white background clashes with the gradient
used for the background. It also causes a very slight
overdraw which theoretically hurts performance a bit.

Change-Id: Ib51df2abdb5f3f262d2983dc07635c03d0c75430
Automatic translation import

Change-Id: I964ac5f3095963726722ee9009124537cf3fb83b
Mms: Remove conflicting AOSP translations

Change-Id: I54e082a1738cd1feb2acda0f1a44c049a74f27d6