Migrate Presentation to WindowContext

After [1], display context had not been regarded as an UI context
even if it is derived from an UI context. Thus, we need to migrate
Presentation to use WindowContext to obtain UI components accesses
and also receive configuration changes from the server side.
Also remove isConfigurationStillValid() related logic since now
the configuration gets updated if the property of the display changes.

[1]: 3c0078e8

Test: atest PresentationTest VirtualDisplayTest KeyguardPresentationTest
Bug: 167462327

Change-Id: Ib5c4a33eeba0e0a6213960300dd4c0a18047686b