Check SDK Version For NeighborCellInfo

Callers on P-or-earlier will receive NeighborCellInfo.
Callers with a newer SDK will simply receive NULL.

This is being done as part of removing support for
this API in favor of getAllCellInfo.

Bug: 62490173
Test: manually tested using SL4A (P and P+ SDK)
Change-Id: Id4919e7fe580655b8fb626961be020b7171ba51b
1 file changed