HDMI: Do not start NewDeviceAction while DeviceDiscoveryAction is running

<Report Physical Address> processed by local device TV starts a
NewDeviceAction which can interfere with DeviceDiscoveryAction.

Flag: EXEMPT bugfix
Test: atest com.android.server.hdmi
Bug: 349007368
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:f25748e46c012ed18d367bf3cb3ae261c7e4a58b)
Merged-In: I1da6e45f852f3e8bab0b51003e7929a6904f80b9
Change-Id: I1da6e45f852f3e8bab0b51003e7929a6904f80b9