IOverlayManager might be null when tests, change ctor to use mock one to fix failed tests. Bug: 167943723 Test: atest WMShellUnitTests Change-Id: I122d95b258e8fab8993e72aba597b184f126a9e1
IOverlayManager might be null when tests, change ctor to use mock one to fix failed tests. Bug: 167943723 Test: atest WMShellUnitTests Change-Id: I122d95b258e8fab8993e72aba597b184f126a9e1