Implement crash reports RSD service

[navin772]

Crash reports service is responsible for pulling iOS crash reports from the device to local. It uses AFC as a direct dependency.

Base methods:

1. ls - list crash reports
2. pull - pull crash reports to local, with erase and match options. erase deletes the report from remote device after pulling to local
3. clear - delete all crash reports from remote device
4. flush - flush reports, triggers com.apple.crashreportmover.shim.remote to flush all reports into CrashReports directory

Advanced methods:

1. watch - Monitor creation of new crash reports for a given process name, runs indefinitely, needs OsTraceService
2. getNewSysdiagnose - create a new sysdiagnose archive and pull it

The advanced methods could be implemented later on when their requirement is met.