Apply PrecomputedText only ImageFloatingTV and its children

TextView might use different text layout than StaticLayout such as BoringLayout.
BoringLayout does not use PrecomputedText and benchmarks show that PrecomputedText(Custom Spannable String) could increase onMeasure time of TextView.
That's why we only apply PrecomputedText to ImageFloatingTV and MessagingTextMessage.

Bug: 289250881
Test: SystemUITests and perfetto
Change-Id: I6fa6bbb9fd8fae855228eeac266d33ce95d99319