cec: OneTouchPlay not buffer when input not ready

BUG=131205504

Problem:
OneTouchPlay not buffer when input not ready and could
not go to corresponding input

Solution:
buffer <Active Source> when when input not ready,
process when input added

Cherry picked and modified from: https://partner-android-review.googlesource.com/c/platform/frameworks/base/+/1381152
Bug: 131205504
Test: manual
Change-Id: I442eddfe1aa9d587054428b78316ff86badc0d84
(cherry picked from commit 1f05fbab7c979200d9f83425e50f12db7d5d7212)