Remember wifi country that's set before boot

Telehony seems to sometimes be reporting the country before boot
is completed so can't persist the data at that time.  Remember
and write it on BOOT_COMPLETED

Also, there are permission issues around writing the setting.

bug:9225156
Change-Id: Ifdf2243da71b0d2ce5743267842597937d790ef5
1 file changed
tree: 02961d43356d5cdfa9b6340d85c7b3a2e861be35
  1. framework/