[SysUI][Floaty] Add support for dumping invocation effect related info

Bug: 407970510
Flag: com.android.systemui.shared.enable_lpp_assist_invocation_effect

Test: Manual

Dumped info by running "adb shell dumpsys activity
com.android.systemui/.SystemUIService TopLevelWindowEffects", sample
output:

SERVICE com.android.systemui/.SystemUIService 3a0f734 pid=8853 user=0
  Client:
    Dump starting: 05-18 15:48:06.835

    com.android.systemui.topwindoweffects.TopLevelWindowEffects:
    ----------------------------------------------------------------------------
    TopLevelWindowEffects:
      isAnimationInterruptible=true
      squeezeProgress=0.0
    SqueezeEffectRepository:
      isPowerButtonLongPressed=false
      isPowerButtonDownAndPowerKeySingleGestureActive=false
      isSqueezeEffectHapticEnabled=true
      isInvocationEffectEnabledByAssistant=true
      longPressPowerDurationFromSettings=500
      invocationEffectInitialDelayMillis=150
      invocationEffectInAnimationDurationMillis=800
      invocationEffectOutAnimationDurationMillis=333
    InvocationEffectPreferences:
      activeUser=0
      activeAssistant=com.google.android.googlequicksearchbox
      savedUser=0
      savedAssistant=com.google.android.apps.myvoiceinteractionservice
      isCurrentUserAndAssistantPersisted=false
      isInvocationEffectEnabledByAssistant=true
      inwardAnimationDurationPaddingDurationMillis=450
      outwardAnimationDurationMillis=333

    CRITICAL dump took 1ms -- com.android.systemui.topwindoweffects.TopLevelWindowEffects

    Dump took 5ms

Change-Id: I62060749d6781a4788ade74a5da9cc2ec3f4b999