Suppress Unicode warnings (#3116)

Author: schmidt-sebastian

firebase-database/src/test/java/com/google/firebase/database/MapperTest.java

@@ -570,7 +570,7 @@ public String getValue4() {
     }
   }
 
-  @SuppressWarnings("ConstantField")
+  @SuppressWarnings({"ConstantField", "NonAsciiCharacters", "UnicodeInCode"})
   private static class UnicodeBean {
     private String 漢字;
 
@@ -1468,6 +1468,7 @@ public void roundTripCaseSensitiveFieldBean4() {
   }
 
   @Test
+  @SuppressWarnings("UnicodeInCode")
   public void roundTripUnicodeBean() {
     UnicodeBean bean = new UnicodeBean();
     bean.漢字 = "foo";

firebase-firestore/src/test/java/com/google/firebase/firestore/util/MapperTest.java

@@ -629,7 +629,7 @@ public String getValue4() {
     }
   }
 
-  @SuppressWarnings({"ConstantField", "NonAsciiCharacters"})
+  @SuppressWarnings({"ConstantField", "NonAsciiCharacters", "UnicodeInCode"})
   private static class UnicodeBean {
     private String 漢字;
 
@@ -1721,6 +1721,7 @@ public void roundTripCaseSensitiveFieldBean4() {
   }
 
   @Test
+  @SuppressWarnings("UnicodeInCode")
   public void roundTripUnicodeBean() {
     UnicodeBean bean = new UnicodeBean();
     bean.漢字 = "foo";