Fix null handling of getAllCellInfo

ServiceStateTracker.getAllCellInfo may return null, but
PhoneBase.privatizeCellInfoList may dereference that.  Check
for null rather than crash the phone.

bug:23201508
Change-Id: I26fcfc015fa1a8d1ec13e34f3369d1848954c44e
1 file changed
tree: 14430377ba0a1fb4ea9daa42772a84efeab605d9
  1. src/
  2. tests/
  3. tools/
  4. Android.mk
  5. CleanSpec.mk
  6. README.txt