Keyguard slice layout fixes

Fixes a series of line break and text layout issues.
Now we have proper text length limit and ellipsize it
correctly.

Change-Id: Idf915b56ee6ee923ce4f1cc21a0c57ff5d0a99ca
Fixes: 71634498
Fixes: 71599239
Fixes: 71476950
Fixes: 71576197
Test: Visual