[2/n InputDispatcher refactor] Consolidate Window and DisplayInfo

Consolidating window and display infos in a subclass. This will enable
us abstract out related states in dispatcher by passing references.

Bug: 367661487
Bug: 245989146
Test: atest inputflinger_tests
Flag: EXEMPT refactor
Change-Id: I09d234687cd797ee9ff2f6b44b6b890e50d4636f

Author: Arpit Singh