nSetLocales needed to be done at the same time of addStyleRun.
So it is natural to be the arguments of addStyleRun.
Since locale change detection take longer time in native, check it
in Java and pass null if not changed.
Here is an example of StaticLayoutPerfTestResult.
Before (median):
createRandom: 3,422,247
createRandom(breakBalanced): 3,448,865
create: 183,642
After:
createRandom: 3,493,079
createRandom(breakBalanced): 3,495,381
create: 193,363
Test: bit CtsWidgetTestCases:android.widget.cts.TextViewTest
Test: bit CtsTextTestCases:android.text.cts.DynamicLayoutTest
Test: bit CtsTextTestCases:android.text.cts.StaticLayoutTest
Test: minikin_tests
Bug: 65175766
Bug: 65024629
Change-Id: I4586cef626f631d4736b0db59ba9f3f6abd3d4ff
5d518dcd5a