Avoid full validation when layers are removed.

Avoid full validation when layers are removed.

We now reset layers for the plane and check if this commit
passes before doing a full validation. One case which is
yet to be handled is when we have free planes and determining
if we can distrbiute layers to these planes.

Jira: None.
Test: No crashes when navigating between different views on
      Android.

Signed-off-by: Kalyan Kondapally <kalyan.kondapally@intel.com>