Rename preference activity

- it is now BlueGnssPrefActivity.

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
start intent to send to main activity

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
rename main activity

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
rename provider service

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
rename mock provider

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
import explicitly util class

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
revert PrefereceFragment usage, still use deprecated methods

Signed-off-by: Hiroshi Miura <miurahr@linux.com>