Send a metric indicating app install was skipped.

This is for the purpose of figuring out in the database which test runs
opt in the incremental setup feature were actually observed with app
installation skip. This helps figure out the impact of the incremental
setup feature.

Flag: TEST_ONLY
Bug: 394384055
Test: atest -c SystemUIGoogleScreenshotTests; atest -c SystemUIGoogleScreenshotTests
Change-Id: I9a0ed40bc854fbe52ceb1ce496e77fcfcac63aa8
3 files changed