apps: fix service labels and supplicant log line highlighting

Two fixes for the service summary display for Chrome OS and Brillo logs:
1. Service state labels are now set using fill (they were stroke and this
caused the labels to appear fuzzy).
2. Supplicant log lines are highlighted with the same color as used in
the graph to increase log readability.

BUG=chromium:576809
TEST=manually tested with log files for Chrome OS and Brillo

Change-Id: I475b1072212946ebff7df2858f9af97c5d56eebc
2 files changed