Add class name to detect correct activity launch

Add class name as a parameter when launching test activities.
Pass class name to monitor to match correct class.

There was a test failure because launching an activity through
instrumentation would take the most recently launched activity.
Since there are multiple displays it is possible to have
multiple resumed activites that were recently launched.
Sometimes the test would detect the IME activity and others the
default test activity. Adding the class name specifies which
activity should have been launched. After finding the correctly
launched activity the test passes consistently.

Bug: 161913518
Test: atest CtsWindowManagerDeviceTestCases:MultiDisplaySystemDecorationTests
Change-Id: Ifbf77501597ac233c4af095c6488282fb35c5181
2 files changed