TextChange made a bad assumption that target text views contained
String objects as their text, which is not always the case. For example,
Gmail ActionBar text views may contain SpannableString objects, which
caused a crash due to a bad cast operation.
Fix is to simply use CharSequence instead of String as the value that
is being stored and set on the text view.
Issue #10651858 TextChange transition casts CharSequence to String when not necessarily safe
Change-Id: I3f67f5d5e39201dc0fd2edcd3e4243033cf9ae08
Issue #10460684 KLP API Review: android.view.transition and android.animation
Issue #10570740 Transitions: inflate transition targets from xml
Change-Id: I7a3f6d3aece2fcafc5efd555d033f79e86635c98
