Profiling for process startup.

[bruno-garcia]

This allows profiling before the SDK actually starts.

Android example:

Android PRs:

• Startup Profiling 1 - Decouple Profiler from Transaction sentry-java#3101
• Startup Profiling 2 - Add options and sampling logic sentry-java#3121
• Startup Profiling 3 - Add ContentProvider and start profile sentry-java#3128