Propagate frame rate correctly to child layers

If a child layer has a valid frame rate, and its parent does not
have a valid frame rate, we need to override the parent's frame
rate to no vote.

If the parent has a valid vote, including no vote, children would
inherit this vote if it has no valid vote.

When we were updating the hierarchy, we incorrectly propagated
novote due to a child having a novote to all its siblings in the tree.
Fix this by tracking inherited frame rate separately.

Bug: 304208511
Test: presubmit

Change-Id: I873e75d678fba8c8217a1887f48726d1e4828049