display: add interface to support content fps

Client can use this interface to set content fps. For
example, QAPE uses it to notify Smomo about App content
fps.

Change-Id: I8727da5869da90ee58fdbbdfbd19a71c453ab6a2
(cherry picked from commit 6f0c140c155fce9a3c9008b0915d147dce412146)
22 files changed