Catch RemoteExceptions in DataShareCallbackDelegate

Catch the RemoteExceptions thrown in DataShareCallback's accept() and
reject() methods, as throwing an exception could result in the
ContentCaptureService crashing.

Bug: 159213080
Fixes: 159213080
Test: ran cts tests
Change-Id: I4ce8f15c835fba665a0657c7b3ed898f4e091b19