Support refactored Region class

For use in KotlinJS (winscope) the Region class cannot have multiple constructors. JS doesn't support method or constructor overload.

This CL make the tests compatible with the newer class version

Bug: 216111397
Test: atest WMShellFlickerTests
Change-Id: Ifa5f8c6e0063185e2986019b3a27f24c93fe05d2
3 files changed