AM: Add AML tests for trampoline and no display activities

In previous releases, activities that do not draw windows affected the launch metrics for
subsequent launches. This adds tests to ensure trampoline and no display activities work
as intended.

Test: atest ActivityMetricsLoggerTests
Bug: 80380150, 118292221
Change-Id: Iaa9201a7b382bdddaaa95e91accfdda2cc244209
4 files changed