1) EmojiTextView and EmojiEditText are used instead of
using code to emojify text.
2) Emoji categories' code points are specified in XML
3) EmojiDrawer itself is a fragment, and its pages are
also fragments, allowing for better memory
management.
Fixes#2938Fixes#2936Closes#3153
// FREEBIE
If the contact doesn't have an image, render a color-coded
background and the first letter of the contact's name.
1) Don't display anything during recipient resolution.
2) Display a # icon in material gray for recipients with no name.
3) Display a material group icon in material gray for groups with
no avatar icon set.
Closes#3104
// FREEBIE
1) Broke out the UI elements of the major Activites into stylable
attributes.
2) Created a 'light' and 'dark' theme for the newly stylable attrs.
3) Touched up some of the UI spacing.
4) Implemented dynamic theme switching support.
