Add a text demo for baselineShift
Add a text demo for baselineShift

Bug: 121157451
Test: ./gradlew ui-r4a:build
Change-Id: Ic7c5b85192c72fb11ffa8459d4b40334e22d7877

androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx