removed the need to specify, for cromite flags, permission for use by java
introduced placeholder support also for the android_chrome_strings_grd target
Add SET_CROMITE_FEATURE_ENABLED*, SET_CROMITE_FEATURE_DISABLED*
and CROMITE_FEATURE macros, logic has been adapted from that found
in brave.
Allows flags to be defined in separate files.
Activates a new cromite tab in chrome://flags with only the flags
added and changed. In android added chrome://flags/cromite
in the setting ui.
Currently in wip