Add API for FLAG_SKIP_PROBING

The flag, used in the newly exposed AdvertisingRequest, allows
skipping the probing step when the service name is known to be unique
already.

This allows implementing RFC 6762 section 8.1 that specifies probing
SHOULD be skipped if it is known via other means that the record set
is unique.

Bug: 384841047
Test: atest CtsNetTestCases:NsdManagerTest
Change-Id: I19d67ff2863af631bd9c2f518b004f1688ac5f87
9 files changed