Update Android Attributes after Crashpad is Launched

[bobbyg603]

We launch Crashpad providing it with attachments and attributes here. Unfortunately we don't have a way to add attributes after the fact.

A short term hacky solution, is we could always look for CrashContext.runtime-xml. This is already a standard BugSplat workaround for overwriting attributes. The file path is passed at launch, but the contents aren't collected until upload time.

Longer term, to support something like breadcrumbing, we would want to update the list dynamically (if possible). Writing to a file repeatedly is expensive and also is a sub-optimal DX.