Setting transparency for clear-all button.

See visual spec: https://gallery.googleplex.com/projects/MCHbtQVoQ2HCZdNNRhNUDzOW/files/MCEf7JcwkS_N8QTSAba7WiJQwMSJbxAVNpw

Bug: 72222505
Test: Manual
Change-Id: I61c7e4ccc89396827a17450db4a5e1017a5579a1
2 files changed