Do not read ECBM system property to avoid race.

Code does a sanity check to make sure ECBM mode is active before
showing notification. However checking system property for that is
not safe as the property may not have been updated. Query the phone
instead.

Bug: 30237792
Change-Id: If650121391f2effccb9461c13d34f49f5bbe70c2
1 file changed