Catch ServiceSpecificException while fetching tethering stats from Netd

Netd#tethergetStats may throw exception sometimes.
Need catch runtime exception to avoid JE

Bug: 238033613
Change-Id: I3db60c2acd1413cf679700e25a8a4c20121f9e5d
diff --git a/service-t/src/com/android/server/net/NetworkStatsService.java b/service-t/src/com/android/server/net/NetworkStatsService.java
index 82b1fb5..f9fe0b7 100644
--- a/service-t/src/com/android/server/net/NetworkStatsService.java
+++ b/service-t/src/com/android/server/net/NetworkStatsService.java
@@ -2236,7 +2236,7 @@
                     throw new IllegalStateException("invalid tethering stats " + e);
                 }
             }
-        } catch (IllegalStateException e) {
+        } catch (IllegalStateException | ServiceSpecificException e) {
             Log.wtf(TAG, "problem reading network stats", e);
         }
         return stats;