[wpilibj] Add Preferences.getNetworkTable() (#7962)

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

@@ -97,6 +97,15 @@ public final class Preferences {
             });
   }
 
+  /**
+   * Gets the network table used for preferences entries.
+   *
+   * @return the network table used for preferences entries
+   */
+  public static NetworkTable getNetworkTable() {
+    return m_table;
+  }
+
   /**
    * Gets the preferences keys.
    *

wpilibj/src/test/java/edu/wpi/first/wpilibj/PreferencesTest.java

@@ -91,6 +91,13 @@ class PreferencesTest {
         "Preferences was not empty!  Preferences in table: " + Arrays.toString(keys.toArray()));
   }
 
+  @Test
+  void getNetworkTableTest() {
+    NetworkTable networkTable = Preferences.getNetworkTable();
+
+    assertEquals(m_table, networkTable);
+  }
+
   @ParameterizedTest
   @MethodSource("defaultKeyProvider")
   void defaultKeysTest(String key) {