SystemServer: reformat flag dumpsys

Clearly indicate that the flag is subject to a local override.
Clearly indicate if the override as been wrongly done
Modify format to only display snake_case name.

Bellow showing different status of flags:

unactif flag
[ ]: foo_flag
actif flag
[■]: foo_flag
actif flag when detecting a local override
[■]: foo_flag  (Manual override)
unactif flag because incorrect overrid (java only)
[ ]: foo_flag  (Manual override) ([■]: Java) ([ ]: Native) INCONSISTENT OVERRIDE FOR THIS FLAG. This can lead to unpredictable behavior.
unactif flag because incorrect overrid (native only)
[ ]: foo_flag  (Manual override) ([ ]: Java) ([■]: Native) INCONSISTENT OVERRIDE FOR THIS FLAG. This can lead to unpredictable behavior.
unactif flag because incorrect overrid (java & native without system reboot)
[ ]: foo_flag  (Manual override) ([■]: Java) ([■]: Native) INCONSISTENT OVERRIDE FOR THIS FLAG. This can lead to unpredictable behavior.

FYI this is how flags were currently printed:
[ ]: fooFlag   foo_flag
[■]: barFlag   bar_flag

Bug: 311772251
Test: manual Build apex, print the flags and check how pretty it is
Flag: Exempt dump mechanisme for flags
Change-Id: I013cebd6fb48bc78cc880e7b79360d4579289bb7