Revert "Remove smiley support"

This reverts commit c7c68dba4f3440f234f65eef579f9aaa82682f8c.

It seems that the smiley support has been removed by a Google dev (Tom Taylor)
without any explanations:
    https://android.googlesource.com/platform/packages/apps/Mms/+/c7c68db

This modification gets the smiley back:
 * ASCII Smileys are converted to images in all received/sent messages.
 * A new menu entry (Insert smiley) is available in the menu of a conversation
   view (ComposeMessageActivity).

I also added this support in QuickMessage too (by parsing the message
just before sending it to the TextView).

PS: removed extras trailing whitespace as advised by Taichi Nishimura

PAC-Rom Conflicts:
	src/com/android/mms/ui/ComposeMessageActivity.java

PAC-Rom Change-Id: I59be9aaed9218459452274c743b71df72d0927ff

This change was originaly made for PAC-Rom but if CM devs want it too,
please use it!

Conflicts:
	src/com/android/mms/ui/MessageListItem.java

Change-Id: Ic3f7005a2c2485405a9259f3ede7fc5ad40336e0

Conflicts:
	res/values/custom_strings.xml
	src/com/android/mms/ui/MessageListItem.java