enforce limits for VisualVoicemailSmsFilterSettings properties

- clientPrefix is now limited to 256 characters
- originatingNumbers is now limited to a list size of 100 and
  each element is also limited to 256 characters

Bug: 308932906
Test: CTS
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:25b326e4844671a18c30426c5bc5d7481fb83d54)
Merged-In: Id4b4358b141bb211a7e340b979774850b4bd2403
Change-Id: Id4b4358b141bb211a7e340b979774850b4bd2403
1 file changed