[Magnifier-33] Add animation on line jump

This CL adds a simple motion animation when the magnifier jumps between
lines.

Bug: 74381647
Test: manual testing
Test: atest FrameworksCoreTests:android.widget.TextViewActivityTest
Test: atest CtsWidgetTestCases:android.widget.cts.TextViewTest
Change-Id: I27caba47b18e694f93739866d6fd69569cb89184
(cherry picked from commit 8175edc7)
Merged-In: I27caba47b18e694f93739866d6fd69569cb89184