p2p: add valid string documentation for network name and passphrase

Bug: 126614191
Test: Unit tests - atest FrameworksWifiApiTests
Change-Id: I105589aa3b6ee184be7fe82a8b657c76247f9ad6
2 files changed
tree: 0872eb78660b176082820eb9b095df87ad376722
  1. framework/
  2. OsuLogin/
  3. OWNERS