Deprecate system/window.h

Renamed it to system/window-deprecated.h and
added a comment to that effect. 
window.h now includes system/window-deprecated.h,
which should make it obvious it shouldn’t be used.

Test: compiled
Bug: 34453351
Change-Id: Ie6953fd4383ba6289bd8950c389d14d9ac41f7d5
2 files changed