Migrate snippet: more performance

[pengzhi-cb]

This PR aims to add the following hard-coded snippets from DAC to repo:
(1 snippet) https://developer.android.com/topic/performance/baselineprofiles/measure-baselineprofile
(1 snippet) https://developer.android.com/topic/performance/baselineprofiles/overview
(1 snippet) https://developer.android.com/topic/performance/benchmarking/macrobenchmark-overview
(1 snippet) https://developer.android.com/topic/performance/jankstats
(1 snippet) https://developer.android.com/topic/performance/startupprofiles/dex-layout-optimizations
(1 snippet) https://developer.android.com/topic/performance/vitals/launch-time

Summary:

1. Updated androidx-benchmark to 1.4.1 and androidx-uiautomator to 2.4.0
2. Moved benchmarking and startup profile generator tests from production source sets (src/main) to the correct test source sets (src/androidTest).
3. Refactored MeasureBaselineProfile.kt and  BaselineProfilesOverview.kt to use the official UI Automator 2.4.0 DSL, removed mock helper classes.

[snippet-bot]

Here is the summary of changes.

You are about to add 5 region tags.

• performance/src/androidTest/java/com/example/android/performance/baselineprofiles/BaselineProfilesOverview.kt:28, tag android_performance_baselineprofiles_overview_generator
• performance/src/androidTest/java/com/example/android/performance/baselineprofiles/MeasureBaselineProfile.kt:30, tag android_performance_baselineprofiles_measure_compilation_modes
• performance/src/androidTest/java/com/example/android/performance/benchmarking/MacrobenchmarkOverview.kt:30, tag android_performance_macrobenchmark_compose_scroll
• performance/src/androidTest/java/com/example/android/performance/startupprofiles/DexLayoutOptimizations.kt:28, tag android_performance_startupprofiles_generator
• performance/src/main/java/com/example/android/performance/jankstats/JankStats.kt:29, tag android_performance_jankstats_state_holder

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[kkuan2011]

Is it possible to remove the new snippets from the misc folder? (We don't want to add any new snippets to that module). Can they go into the performance module, or do they need to go in the performance-samples repo?

[pengzhi-cb]

Is it possible to remove the new snippets from the misc folder? (We don't want to add any new snippets to that module). Can they go into the performance module, or do they need to go in the performance-samples repo?

Oops, I did move them but the commit was lost when I move things into performance module. They are now in the proper module 2f42210