[FIXIT] Add null check in JsonBuilder.java to avoid NPE for telephony related builders.

BUG:23788657
Change-Id: Ic45bdcd5ee8ceed15d063273c6cce29bcd8ab05c
1 file changed
tree: 91f39f9a74e8461f6de95e21420c107cc0f7662b
  1. sl4a/