Revert sendEnvelope changes [DO NOT MERGE]

Revert various CLs involving sendEnvelope changes from I/O preview.
The following changes were reverted:

Revert "Modify TelephonyManager to expose sendEnvelopeWithStatus instead of sendEnvelope."

This reverts commit 5b2ac949.

Revert "Expose sendEnvelope." [DO NOT MERGE]

This reverts commit dcca0fba.

Change-Id: I659d3aa16b8b9a5c33c8c64404f7d7442d9d0e57