Hui Yu 8eeac7d338 Revert "Use ArraySet for the list of observer WeakReference." ...

This reverts commit 3488f1afcb.

Reason for revert: The change to ArraySet increase system_server startup time by 20ms as reported in b/111658334. It is because add() operation into ArraySet takes much longer than ArrayList. 

Change-Id: I1523332a8c9fc74cfef29b119a3c4c54d55596ec

2018-07-20 17:24:36 +00:00

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android

Revert "Use ArraySet for the list of observer WeakReference."

2018-07-20 17:24:36 +00:00

google/android

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