Add IntentFilter auto verification

The purpose of this feature is to prompt the Disambiguation dialog
to Users as less as possible.

- add the new "autoVerify" property to the IntentFilter class
- add new APIs to PackageManager:
 verifyIntentFilter(int, int, List<String>),
 getIntentVerificationStatus(String, int),
 updateIntentVerificationStatus(String, int, int),
 getIntentFilterVerifications(String)
for supporting IntentFilter verification
- add support for multi-user
- update PackageManager for IntentFilter verification:
basically when we are installing a new package, ask for verification
of all domains from the IntentFilters that have the "autoVerify" to true.
This means that the PackageManager will send a well defined protected
broadcast (with a new INTENT_FILTER_NEEDS_VERIFICATION action) to
an IntentFilter verifier to do the real job of verification.
We are passing in the broadcast Intent all the necessary data for
doing the verification. The PackageManager will receive as response
the result code of the domain verifications and, if needed, the list
of domains that have failed the verification.
- add a new INTENT_FILTER_VERIFICATION_AGENT permission that needs to
be set by an intent filter verifier to be considered as a trustable
party by the PackageManager.
- add also a new BIND_INTENT_FILTER_VERIFIER permission for securing
the binding between the PackageManager and a service doing the
intent filter verifications.
- add ResolveInfo filterNeedsVerification which is a boolean
to knows if the IntentFilter is of a type that needs a verification
(action VIEW, category BROWABLE, HTTP/HTTPS data URI)
- add new "domain-preferred-apps" / "d" dump command for listing the
prefered Apps for all domains
- add new "intent-filter-verifiers" / "ivf" command for listing the
IntentFilterVerifier used
- introduce the IntentVerificationService which is a basic service
for verifying IntentFilters. This service will send HTTPS requests
to the domain declared in the IntentFilter(s) for doing the
verification. This service has a low priority level so that it
can be replaced by a more sophisticated one if needed. This service
is updating the PackageManager intent verification states thru
the updateIntentVerificationStatus(...) API.
- update MockPackageManager

Change-Id: I0bfed193d0bf1f7c7ac79f6c1b160b7ab93b5fb5