Solve GAR talkback touch target should be at least 48dp

Move padding top and bottom from KeyValueRow to TextView
The TextView touch area to 48dp

Fixes: 130276583
Test: atest DocumentsUIGoogleTests
Test: manual enable talk back make sure TextView focus hight > 48dp
Change-Id: I2c7d6d6b247542bda3d4c5f73518a730e1af221e
1 file changed