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This change combines the following fixes:

1) Usat Phase 2 feature support
Added changes to support Idle screen, Language Selection.
Fix Display Alpha for proactive commands

2) Fix to display dialog for DISPLAY_TEXT commands
For Display Text commands that are low priority, we check the
Idle Screen status before displaying the dialog. However, the handling
for the result of the Idle Screen request is missing. Add this handling.

3) Fix crash on Idle Mode Text proactive command
After checking for screen status, use the saved command object
to process the Idle Mode Text command.

4) Stk: Update Manifest for modified Idle Screen Intent
Update StkCmdReceiver's intent-filter to use the updated idle
screen intent name

5) Stk: General Enhancements to StkAppService
i) Support GET_CHANNEL_STATUS command
ii)Set mMainCmd to null (SET_UP_MENU) only when we
   receive a remove menu command
iii)Cleanup idlemode text code: Removed the intent extra
    SCREEN_STATUS_REQUEST which is no longer used (introduced
    in the change (3) above).

6) Handle LOCALE event properly

Bug: 17553408
Change-Id: Ie9a52f62bb520650eec68e3209fab1dd6343fe1c