Changed ActivityManager.requestBugreport() to take a 'progress' parameter.

When progress is set to 'true', it calls the new, enhanced
'bugreportplus' service, while when 'false' it calls the regular
'bugreport' service.

'bugreportplus' is more user-friendly (it shows a system notification
with the progress, allow user to cancel, etc...), at the cost of
consuming more resources. As such, the "Take Bug Report" UI will be
changed to offer the user a combo with these 2 options, but for now it's
always going to be 'bugreportplus'

BUG: 26034608
Change-Id: I21a6b5b092a85614e91d523b8f4df1fb00e49b3b