Updating network info state should return true.

Update AccessPoint.java so that network state changes return updated
equals true, so that corresponding UI elements will updated
appropriately.

Bug: b/37289220
Test: runtest --path
packages/SettingsLib/tests/integ/src/com/android/settingslib/wifi/AccessPointTest.java

Change-Id: I1bc74997227b46468ef11efbf183a95ec0d2b15f