Add chevron to Screen cast tile

Adds the chevron when it's not casting and we expect to open a dialog

Test: manual
Test: atest CastTileTest
Fixes: 191154648
Change-Id: Ib3e70d3c8dbc797fd85a6781743270ed4abc7e63
Merged-In: Ib3e70d3c8dbc797fd85a6781743270ed4abc7e63
(cherry picked from commit 9dd955bd0cd08674a5f3a791ab6fee5085bf4afc)
2 files changed