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If we are using an old API for the emulator
(API 19 for example) and then upgrade the AVD
to API 23 through the AVD settings, we get a bunch
of crashes in the TelephonyProvider,
as it is looking for a file that does not exist
that concerns upgrading from old "apn"'s.

This CL adds this file to the files to be copied
to /etc in the system image.

BUG: b.android.com/200390
BUG=27273457

RELEASE NOTE: Fixed telephony service crashes on startup when upgrading from an old API.

Change-Id: I227713880bf20541c759aab588c00197ac7aebfd
(cherry picked from commit e5083159401edf1df5109b56d1aedbbb739584e6)