core: Wrap keepalive runnables with exception logging

executor.schedule() will "eat" any exceptions thrown by the Runnables,
because the Future is expected to be used to see them. However, we never
call get() on the Future, so we need to just the exceptions like we do
elsewhere in this case.

core/src/main/java/io/grpc/internal/KeepAliveManager.java

@@ -55,7 +55,7 @@ public class KeepAliveManager {
   private long nextKeepaliveTime;
   private ScheduledFuture<?> shutdownFuture;
   private ScheduledFuture<?> pingFuture;
-  private final Runnable shutdown = new Runnable() {
+  private final Runnable shutdown = new LogExceptionRunnable(new Runnable() {
     @Override
     public void run() {
       boolean shouldShutdown = false;
@@ -71,8 +71,8 @@ public class KeepAliveManager {
         keepAlivePinger.onPingTimeout();
       }
     }
-  };
-  private final Runnable sendPing = new Runnable() {
+  });
+  private final Runnable sendPing = new LogExceptionRunnable(new Runnable() {
     @Override
     public void run() {
       boolean shouldSendPing = false;
@@ -95,7 +95,7 @@ public class KeepAliveManager {
         keepAlivePinger.ping();
       }
     }
-  };
+  });
 
   private long keepAliveDelayInNanos;
   private long keepAliveTimeoutInNanos;