email: Add isRunningJBMR1OrLater method

from aosp: https://android-review.googlesource.com/#/c/89374

Change-Id: I9ec09dd27407461e4498f48eae5e1c39fff9e0df
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Merge branch 'upstream/cm-11.0'