[FF 6.0.0] settings-bluetooth cannot enable BT in demo unit

Close for GG RC2

Update in Karlsruhe integration session.
Germany's greenbox has i2c error many times and it can't get BT's address. hciconfig returns "00:00:00:00:00:00",
After debugging,

• Should use Power supply (AC adopter ) that attached KF (DC 12.x V)

• some USB hub has trouble to KF's i2c error.

• Use KF-M06 version is better. : https://elinux.org/R-Car/Boards/Kingfisher#The_M06_board_has_improved_the_I2C_error_problem.2C_Fixed_a_rare_start-up_problem_when_turned_power_on

• meta-rcar resolved I2C issue : https://github.com/CogentEmbedded/meta-rcar/commit/b9be2cd1ed7e6fe3662cf99001a0fabc51652ecf
  => Bump up to master(GG) and FF

@Jan-Simon Moeller,@Scott Murray @Matt Ranostay

There is hack workaround for M3KF. I add sleep 5 in ti-uim.service.  I use head of flounder branch and remove https://lf-automotivelinux.atlassian.net/browse/SPEC-1945#icft=SPEC-1945 error.

@Matt Ranostay it works paring my Android, mediaplayer can work BT-audio (But sometimes BT audio via mediaplayer is not heard ...)
However, Phone app doesn't work at all. When I do phone call, but no sound. 

@Harunobu Kurokawa And you can pair, stream a2dp, and etc?