In an effort to reduce unnecessary String operations and Binder calls
from AccessibilityInteractionClient, also add channels to propagate
tracing state to AccessibilityInteractionClient through
AccessibilityManager.
Bug: 157601519
Test: adb shell cmd accessibility start-trace
adb shell cmd accessibility stop-trace
Change-Id: Idfe220bc64a9c83679201b9a9a36b1c492f9d6cc