Split status bar window (1/N)

This is the first step to create another new window for status bar.

Small window => TYPE_STATUS_BAR: The bar on top of screen.
Large window => TYPE_NOTIFICATION_SHADE: Anything else.

Bug: 136993073
Test: build then flash
Test: atest WmTests SystemUITests
Test: atest RegisterStatusBarResultTest InsetsFlagsTest

Manual Test:
- Bouncer can show when leave showWhenLocked activity.
- StatusBar can show when comes HUN in fullscreen mode.
- StatusBar can play enter/leave animation in fullscreen mode.
- Able to drag notification panel when bubble/glow existing.
- Switch to market launcher, and run above tests.
- Drag notification panel from launcher several times and observe it
  works fine.

Change-Id: Id9f72cd0e21f01b50d57f02ea60f97c6460926b7