Add one of codec detection APIs.
This will show and get the impedance values of speaker
by floating format.
Bug:144901001
Test: manually test
ACTION_SPEAKER_IMPEDANCE
$ adb shell cat /sys/devices/platform/codec_detect/resistance_left_right
0,0
Change-Id: I6ffa471b07c5e7f435def82f407234d7d006806e
Signed-off-by: rogerfang <rogerfang@google.com>