563c4a6557
BluetoothPairingDialogFragment has code that makes the OK button on the dialog disabled until the user has entered at least one character into the PIN field. However it didn't properly handle the case where the user had entered some text and then rotated the screen - because it always marked the OK button as disabled during onShow even if it already had some content. This CL fixes that by looking at the text content and only disabling the OK button if the content is empty. Bug: 36514895 Test: make RunSettingsRoboTests Change-Id: I4e8e70089a862e67b20ff614bbaa64fc2b641fd4