[path_provider] Remove unused Guava dependency (#6744)

* Remove unused Guava dependency

* Metadata

* Update Nullable import

Author: stuartmorgan-g

packages/path_provider/path_provider_android/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.0.22
+
+* Removes unused Guava dependency.
+
 ## 2.0.21
 
 * Updates code for `no_leading_underscores_for_local_identifiers` lint.

packages/path_provider/path_provider_android/android/build.gradle

@@ -55,6 +55,5 @@ android {
 
 dependencies {
     implementation 'androidx.annotation:annotation:1.5.0'
-    implementation 'com.google.guava:guava:28.1-android'
     testImplementation 'junit:junit:4.13.2'
 }

packages/path_provider/path_provider_android/android/src/main/java/io/flutter/plugins/pathprovider/PathProviderPlugin.java

@@ -9,6 +9,7 @@
 import android.os.Build.VERSION_CODES;
 import android.util.Log;
 import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import io.flutter.embedding.engine.plugins.FlutterPlugin;
 import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.BinaryMessenger.TaskQueue;
@@ -17,7 +18,6 @@
 import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
-import javax.annotation.Nullable;
 
 public class PathProviderPlugin implements FlutterPlugin, PathProviderApi {
   static final String TAG = "PathProviderPlugin";

packages/path_provider/path_provider_android/pubspec.yaml

@@ -2,7 +2,7 @@ name: path_provider_android
 description: Android implementation of the path_provider plugin.
 repository: https://github.com/flutter/plugins/tree/main/packages/path_provider/path_provider_android
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+path_provider%22
-version: 2.0.21
+version: 2.0.22
 
 environment:
   sdk: ">=2.14.0 <3.0.0"