Use Bundle for inter-process message

The message sent from NetworkScanRequestTracker to TelephonyScanManager
might be across different process, so we have to wrap the List<CellInfo> into
Bundle because List<> is not parcelable.

Cherry-picked cleanly from:
https://googleplex-android-review.googlesource.com/#/c/2467157/

Test: Telephony sanity tests
Bug: 30954762

Merged-in: I77945b247530b85c0b82876d528549498a711550
Changg-Id: I77945b247530b85c0b82876d528549498a711550
(cherry picked from commit 56049437)

Change-Id: Iec4043e611a8f58733a361ec9a52fc74e1c974d5