Fix encoding failure (#6203)

Per [b/361535657](https://b.corp.google.com/issues/361535657),

This fixes the encoders unit test failures. Encoders generates imports
that aren't necessarily needed, just for the sake of being safe. This
also means that our resource files that we use for checking the
generated encoding have the extra imports. But, our formatting/linting
(spotless) removes these imports as it recognizes they're not needed.

Since we're testing the expected behavior of encoders- we expect these
imports to be present regardless. It's also a reasonable assumption that
spotless doesn't need to check resource files. So this PR re-adds the
missing imports, and configures spotless to ignore files under
`test/resources` directories.

Author: daymxn

build.gradle

@@ -91,6 +91,7 @@ configure(subprojects) {
     spotless {
         java {
             target 'src/**/*.java'
+            targetExclude '**/test/resources/**'
             googleJavaFormat('1.22.0').reorderImports(false).skipJavadocFormatting()
         }
         kotlin {

encoders/firebase-encoders-processor/src/test/resources/ExpectedAtEmptyAnnotation.java

@@ -14,6 +14,10 @@
 
 package com.example;
 
+import java.lang.Class;
+import java.lang.Object;
+import java.lang.Override;
+import java.lang.String;
 import java.lang.annotation.Annotation;
 
 public final class AtEmptyAnnotation {

encoders/firebase-encoders-processor/src/test/resources/ExpectedAtMyAnnotation.java

@@ -14,6 +14,10 @@
 
 package com.example;
 
+import java.lang.Class;
+import java.lang.Object;
+import java.lang.Override;
+import java.lang.String;
 import java.lang.annotation.Annotation;
 import java.util.Arrays;
 

encoders/firebase-encoders-processor/src/test/resources/ExpectedGenericsEncoder.java

@@ -18,6 +18,8 @@
 import com.google.firebase.encoders.config.Configurator;
 import com.google.firebase.encoders.config.EncoderConfig;
 import java.io.IOException;
+import java.lang.Override;
+import java.lang.SuppressWarnings;
 
 /**
  * @hide */

encoders/firebase-encoders-processor/src/test/resources/ExpectedGenericsEncoderWithUnknownType.java

@@ -18,6 +18,8 @@
 import com.google.firebase.encoders.config.Configurator;
 import com.google.firebase.encoders.config.EncoderConfig;
 import java.io.IOException;
+import java.lang.Override;
+import java.lang.SuppressWarnings;
 
 /**
  * @hide */

encoders/firebase-encoders-processor/src/test/resources/ExpectedMyClassEncoderWithExtraProperty.java

@@ -19,6 +19,8 @@
 import com.google.firebase.encoders.config.Configurator;
 import com.google.firebase.encoders.config.EncoderConfig;
 import java.io.IOException;
+import java.lang.Override;
+import java.lang.SuppressWarnings;
 
 /**
  * @hide */

encoders/firebase-encoders-processor/src/test/resources/ExpectedRecursiveGenericEncoder.java

@@ -20,6 +20,8 @@
 import com.google.firebase.encoders.config.Configurator;
 import com.google.firebase.encoders.config.EncoderConfig;
 import java.io.IOException;
+import java.lang.Override;
+import java.lang.SuppressWarnings;
 
 /**
  * @hide */

encoders/firebase-encoders-processor/src/test/resources/ExpectedSimpleClassEncoder.java

@@ -18,6 +18,8 @@
 import com.google.firebase.encoders.config.Configurator;
 import com.google.firebase.encoders.config.EncoderConfig;
 import java.io.IOException;
+import java.lang.Override;
+import java.lang.SuppressWarnings;
 
 /**
  * @hide */

encoders/firebase-encoders-processor/src/test/resources/ExpectedTypeWithListEncoder.java

@@ -18,6 +18,8 @@
 import com.google.firebase.encoders.config.Configurator;
 import com.google.firebase.encoders.config.EncoderConfig;
 import java.io.IOException;
+import java.lang.Override;
+import java.lang.SuppressWarnings;
 
 /**
  * @hide */