Add dump of InputConsumer to ViewRootImpl

To further debug ANR issues, add dump of InputConsumer-related objects
to ViewRootImpl

Example dump:

      android.view.ViewRootImpl$WindowInputEventReceiver
       mInputChannel: 25697fd com.google.android.pixel.setupwizard/com.google.android.pixel.setupwizard.user.WelcomeActivity (client)
       mSeqMap: {}
       mReceiverPtr:
        mInputConsumer:
          mResampleTouch = true
          mChannel = 25697fd com.google.android.pixel.setupwizard/com.google.android.pixel.setupwizard.user.WelcomeActivity (client)
          mMsgDeferred: false
          Batches:
              <empty>
          mSeqChains:
              <empty>

        mBatchedInputEventPending: false
        mFinishQueue:
          <empty>

    Choreographer:
      mFrameScheduled=false
      mLastFrameTime=1625545 (8 ms ago)

Bug: 160561987
Test: adb shell dumpsys activity -v all | grep -i input -C 50
Test: adb shell dumpsys activity service SystemUIService | grep -i EventReceiver -C 20
Change-Id: I99807c264ced8eb939b90a30e2ff91775fbdec40