Stop RcsService crash when CarrierConfig misbehaves

When the CarrierConfig config returns null, we do
not crash anymore.

Bug: 37868318
Test: Manual Testing
Merged-In: Icb6d2d99bc108d5c238f1a90ef382457f6c43f35
Change-Id: Icb6d2d99bc108d5c238f1a90ef382457f6c43f35
1 file changed
tree: 08928e9eb0509a4422d8b3e5ccf2396cf7857f11
  1. rcs/