Bring more classes into Unified Mail

Bringing in
SubjectDisplayChanger: (was called ConversationSubjectDisplayer in Gmail)
AbstractMailActivity: (was called GmailBaseActivity in Gmail)
MailActivity: (was called GmailActivity in Gmail)

These are called the same things they were in Gmail:
ActivityController
ControllerFactory
OnePaneController
TwoPaneController

Change-Id: Ie761407cad891b669172acc729950f9d358f5c34
12 files changed
tree: bb5c3ec71766cf1c9d71b1a2d074ddd4716eac96
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. CleanSpec.mk
  7. proguard.flags