Remove app links caller BROWSABLE requirement

Does not require BROWSABLE category on the caller side anymore to apply
app links logic. However, it is now enforced on the receiver side, such
that all IntentFilter matches must contain BROWSABLE to be considered
approved for a domain.

Bug: 181890795

Change-Id: I8d5a10c3b8cc2370a4a69d4abe9ee74b1964f19e