Add snippets for trigger based profiling section of ProfilingManager docs

[edgararriagag]

Snippets for upcoming trigger based profiling section

[snippet-bot]

Here is the summary of changes.

You are about to add 4 region tags.

• misc/src/main/java/com/example/snippets/profiling/ProfilingManagerJavaSnippets.java:81, tag android_profiling_manager_triggered_trace_java
• misc/src/main/java/com/example/snippets/profiling/ProfilingManagerJavaSnippets.java:123, tag android_profiling_manager_triggered_trace_setup_upload_job_java
• misc/src/main/java/com/example/snippets/profiling/ProfilingManagerKotlinSnippets.kt:94, tag android_profiling_manager_triggered_trace
• misc/src/main/java/com/example/snippets/profiling/ProfilingManagerKotlinSnippets.kt:134, tag android_profiling_manager_triggered_trace_setup_upload_job

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[AliceYuan]

added some comments the java comments also apply to the kotlin files!

[AliceYuan]

lgtm!