WifiP2pManager: Add annotation Nullable for API: onDeviceInfoAvailable

Bug: 126700793
Build: make api-stubs-docs-update-current-api, full build
Test: UnitTest, atest android.net.wifi.p2p.WifiP2pManagerTest
Change-Id: I18698d7776e071cde0ed28dcd349cc08cc41b173
2 files changed