tree b68b670759212eed3e83221bb87e04a60a35ea36
parent c6c06b004eb16cb060ca9b62da2acb4417dba4a2
author Seongho Kim <sh_tiger.kim@samsung.com> 1542343488 +0900
committer Jordan Liu <jminjie@google.com> 1544232844 +0000

Return "" not "null"

Some models such as LDU, WIFI do not have "gsm.version.baseband",
which should return "null" when it is called.
However it returns "" not "null"

Bug: 120685535
Test: Self-Test
Change-Id: Idc1363d45a0ece3a35f46da287e21015ac1387af