updating the red color brightness for emergency items

also, removed a color from symbols since we don't need to use it java
code anymore. It was originally used as a text color in java code.
However, now the text color has been updated to use black (which is
already available in the android framework resources)

Screenshot - https://screenshot.googleplex.com/AWvZd8CNrRy5usY

BUG: 194355651
Change-Id: I3fcb9c4ac6035b3bdfc8752a1c29554993ebc0e9
(cherry picked from commit 251d404f5f7023945149dfa647d8419e22eb92fb)