Cannot create TvInputInfo when implementing Android TV Input Service

Question

To create a TvInputInfo, we can use the Builder in the TvInputInfo, which goes to

//frameworks/base/media/java/android/media/tv/TvInputInfo.java
public TvInputInfo build() {
...
hdmiConnectionRelativePosition = getRelativePosition(mContext, mHdmiDeviceInfo);

and then

private static int getRelativePosition(Context context, HdmiDeviceInfo info) {
    HdmiControlManager hcm = (HdmiControlManager) context.getSystemService(Context.HDMI_CONTROL_SERVICE);
    if (hcm == null) {
        return HdmiUtils.HDMI_RELATIVE_POSITION_UNKNOWN;
    }
    return HdmiUtils.getHdmiAddressRelativePosition(info.getPhysicalAddress(), hcm.getPhysicalAddress());
}

The hcm.getPhysicalAddress() at the last line goes to

mService.getPhysicalAddress() and mHdmiCecController.getPhysicalAddress()

Finally, reach

//frameworks/base/services/core/java/com/android/server/hdmi/HdmiCecController.java
@ServiceThreadOnly
int getPhysicalAddress() {
    assertRunOnServiceThread();
    return mNativeWrapperImpl.nativeGetPhysicalAddress();
}

Here, calling assertRunOnServiceThread() outside of the HdmiControlService throws an exception.

private void assertRunOnServiceThread() {
    if (Looper.myLooper() != mControlHandler.getLooper()) {
        throw new IllegalStateException("Should run on service thread.");
    }

Is it a known issue? Or if there exists some other method to create a TvInputInfo without reaching the above assertRunOnServiceThread statement?