apn: Drop legacy and unsupported 'bearer'

It is a legacy attribute that Qualcomm kept maintaining for backwards
compatibility. We're not porting support for it to FP3 Android 13; no
partner networks are affected; validating transition to the new APN
attribute "network_type_bitmask" is out of scope. Instead, just drop the
legacy attribute.

See commit platform/packages/providers/TelephonyProvider@374ce6d1c9
(Qualcomm/CodeLinaro commit).

Issue: FP3-A13#56
Change-Id: I29edfb914e98b3c661e8beb5947feee77940cb9f
1 file changed