Remove nSetLocales

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