Use createRandomUnicastAddress from MacAddressUtils

createRandomUnicastAddress has moved from MacAddress to
MacAddressUtils.

This was done to avoid adding createRandomUnicastAddress to the
MacAddress API surface.

Bug: 135998869
Test: atest FrameworksWifiTests
Change-Id: I91bc1c2a99f733ba0e5f982b2346d22a825e525b
Merged-In: Iedf1b88b4830f6fe8ed194c06ce4ba69a9ae00d1
6 files changed