Change null behavior of getCellBandwidths

Returns empty array instead of null when there are
no cell bandwidths.

Bug: 73751023
Test: make, runtest
Change-Id: Idc3f034bbea8f6c3f11dcd125f760b121d2c91d9
Merged-In: Idc3f034bbea8f6c3f11dcd125f760b121d2c91d9
(cherry picked from commit c119a863501cc21bfe4853ad46987a2021041e2b)
1 file changed