tree 283f4bb76f7a0d4a40e077cf7747e9628a39fc38
parent d711ed3021a68e106b1eb1654671434043f0e5d5
author Yunfan Chen <yunfanc@google.com> 1553679306 +0900
committer Yunfan Chen <yunfanc@google.com> 1553833322 +0900

Refine calls related to process global configuration

updateFrom is an expensive method, and we want to avoid it if possible.
If a process has not register to any display as a configuration change
listener, we do not need to do the manual merge in getConfiguration.

Another improvement is, as getGlobalConfiguration returns the
mFullConfiguration itself without copy, getProcessGlobalConfiguration
should be safe to do the same thing. Remove the copy to furthur
accelerate the related calls. But make a copy before changing it in
getConfiguration.

Test: go/wm-smoke
Test: ddms shows a great performance improvement
Test: atest com.android.uibench.janktests.UiBenchJankTests
Bug: 129269005
Bug: 129389526
Change-Id: Ie560917d57932e58bf1db796814eb1c519706f35