commit 6c04f9b6da88021675611ce4f504a8337749d8c3
author Riddle Hsu <riddlehsu@google.com> Tue Jan 18 15:40:25 2022 +0800
committer Xin Li <delphij@google.com> Wed Mar 02 18:17:45 2022 -0800
tree 94dbbb1779ba99164a220fa8aaa3527149822aa7
parent 941c4a4af0da3fbd6aca0ad43a4f4f3740268a32

Fix leakage of DisplayContent referenced from TransitionController

Unlike AppTransition which is associated DisplayContent, the
TransitionController is a global instance. So it needs to unregister
the listener when the display is removed.

Bug: 214991741
Test: Start/stop screen recording multiple times (create virtual
      display). The heap dump of system server should not contain
      many DisplayContent instances.
(cherry picked from commit 491914c17c869a174f91d0414181d1be11e040a3)
(cherry picked from commit c3eaf662257919343210b96f5d5aef161df0723e)
Merged-In: I44e2a794981fc114ada0ce98cd2471adf623d856
Change-Id: I44e2a794981fc114ada0ce98cd2471adf623d856