Add setRequestedFrameRate and getRequestedFrameRate APIs to View

This CL add public APIs setRequestedFrameRate and getRequestedFrameRate
to View. setRequestedFrameRate allows developers to set a preferred
frame rate or preferred frame rate category to a View.

Developer can pass a positive integer to setRequestedFrameRate to set
preferred frame rate or pass a constant variable (e.g.,
REQUESTED_FRAME_RATE_CATEGORY_LOW or REQUESTED_FRAME_RATE_CATEGORY_HIGH)
toe set preferred frame rate category.

Bug: 278731444
Test: atest ViewRootImplTest / ViewTest
Change-Id: Ica0ab97e96bd104e73dfe95bbd4917bf24e8f7cb