[build] Change defaults for Java lints (#4300)

Removes the need to individually suppress the "serial" warning.

wpilibj/src/main/java/edu/wpi/first/wpilibj/ADIS16448_IMU.java

@@ -351,8 +351,7 @@ public class ADIS16448_IMU implements AutoCloseable, NTSendable {
 
   /** */
   private static int toInt(int... buf) {
-    return (int)
-        ((buf[0] & 0xFF) << 24 | (buf[1] & 0xFF) << 16 | (buf[2] & 0xFF) << 8 | (buf[3] & 0xFF));
+    return (buf[0] & 0xFF) << 24 | (buf[1] & 0xFF) << 16 | (buf[2] & 0xFF) << 8 | (buf[3] & 0xFF);
   }
 
   /** */

wpilibj/src/main/java/edu/wpi/first/wpilibj/ADIS16470_IMU.java

@@ -392,8 +392,7 @@ public class ADIS16470_IMU implements AutoCloseable, NTSendable {
    * @return
    */
   private static int toInt(int... buf) {
-    return (int)
-        ((buf[0] & 0xFF) << 24 | (buf[1] & 0xFF) << 16 | (buf[2] & 0xFF) << 8 | (buf[3] & 0xFF));
+    return (buf[0] & 0xFF) << 24 | (buf[1] & 0xFF) << 16 | (buf[2] & 0xFF) << 8 | (buf[3] & 0xFF);
   }
 
   /**

wpilibj/src/main/java/edu/wpi/first/wpilibj/AnalogTrigger.java

@@ -16,7 +16,6 @@ import edu.wpi.first.wpilibj.AnalogTriggerOutput.AnalogTriggerType;
 /** Class for creating and configuring Analog Triggers. */
 public class AnalogTrigger implements Sendable, AutoCloseable {
   /** Exceptions dealing with improper operation of the Analog trigger. */
-  @SuppressWarnings("serial")
   public static class AnalogTriggerException extends RuntimeException {
     /**
      * Create a new exception with the given message.

wpilibj/src/main/java/edu/wpi/first/wpilibj/AnalogTriggerOutput.java

@@ -40,7 +40,6 @@ import edu.wpi.first.util.sendable.SendableBuilder;
  */
 public class AnalogTriggerOutput extends DigitalSource implements Sendable {
   /** Exceptions dealing with improper operation of the Analog trigger output. */
-  @SuppressWarnings("serial")
   public static class AnalogTriggerOutputException extends RuntimeException {
     /**
      * Create a new exception with the given message.

wpilibj/src/main/java/edu/wpi/first/wpilibj/Relay.java

@@ -31,7 +31,6 @@ public class Relay extends MotorSafety implements Sendable, AutoCloseable {
    * This class represents errors in trying to set relay values contradictory to the direction to
    * which the relay is set.
    */
-  @SuppressWarnings("serial")
   public static class InvalidValueException extends RuntimeException {
     /**
      * Create a new exception with the given message.