Implement consentless bugreport mechanism

When required conditions are met, bugreport could be approved silently:
 1. BugreportMode allows consentless bugreport.
 2. Current build type is "userdebug" or "eng".
 3. Caller has its OP_CAPTURE_CONSENTLESS_BUGREPORT_ON_USERDEBUG_BUILD App-Op ALLOWED.

 - Adds an IsConsentlessBugreportAllowed() function in dumpstate.cpp.
   The function checks BugreportMode and returns false when mode is BUGREPORT_MODE_TELEPHONY:
   BUGREPORT_MODE_TELEPHONY mode bug reports MUST obtain user consent every time.
 - In Dumpstate::MaybeCheckUserConsent(), pass the consentless bugreport allowance info to
   IncidentCompanionService.authorizeReport() through its flags param.

Ignore-AOSP-First: Consentless bugreport is a pixel-only feature at first.

Legal tracker bug: 262936053
Privacy tracker bug: 262936015
Security tracker bug: 265360498

Bug: 259436697
Bug: 262628255
Bug: 263163716
Test: builds
Test: Manual test
Change-Id: If4decae0c92b79d5157f421c0721b6a1db184ad4