Implementing custom log formatter

Implemented a custom log formatter for KeyMint that includes the log level, line
number and file where the log call is located. A log now will look like:

INFO: trusty/user/app/keymint/ Accepted connection from Uuid 00000000-0000-0000-0000-000000000000.

Bug: 259556277
Test:, run rust unittests, look at qemu l
Change-Id: I964f0b351d1adb78d9e7c010ffb7db768cd9f78c
2 files changed