Revert "Clear mEnterTransitionCoordinator after content shows."

This reverts commit 8aef548893f7fbf57f7cd3fa179ef88ed69e80c8.

Fixes: 239497474
Fixes: 239595736
Fixes: 240211711

Reason for revert: b/240211711 b/239595736 b/239497474

Change-Id: I3b13b49c91d38055b3e5b9d772dfe21e054911b6
1 file changed