[path_provider] Revert Gradle and androidx.annotation bump in path_provider_android (#6231)

diff --git a/packages/path_provider/path_provider_android/CHANGELOG.md b/packages/path_provider/path_provider_android/CHANGELOG.md
index 0ea517e..63a731a 100644
--- a/packages/path_provider/path_provider_android/CHANGELOG.md
+++ b/packages/path_provider/path_provider_android/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.0.20
+
+* Reverts changes in versions 2.0.18 and 2.0.19.
+
 ## 2.0.19
 
 * Bumps kotlin to 1.7.10
diff --git a/packages/path_provider/path_provider_android/android/build.gradle b/packages/path_provider/path_provider_android/android/build.gradle
index 53e39b1..4bfa738 100644
--- a/packages/path_provider/path_provider_android/android/build.gradle
+++ b/packages/path_provider/path_provider_android/android/build.gradle
@@ -2,14 +2,13 @@
 version '1.0-SNAPSHOT'
 
 buildscript {
-    ext.kotlin_version = '1.7.10'
     repositories {
         google()
         mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.2.2'
+        classpath 'com.android.tools.build:gradle:3.3.0'
     }
 }
 
@@ -53,7 +52,7 @@
 }
 
 dependencies {
-    implementation 'androidx.annotation:annotation:1.4.0'
+    implementation 'androidx.annotation:annotation:1.1.0'
     implementation 'com.google.guava:guava:28.1-android'
     testImplementation 'junit:junit:4.13.2'
 }
diff --git a/packages/path_provider/path_provider_android/pubspec.yaml b/packages/path_provider/path_provider_android/pubspec.yaml
index 94ff726..c442d16 100644
--- a/packages/path_provider/path_provider_android/pubspec.yaml
+++ b/packages/path_provider/path_provider_android/pubspec.yaml
@@ -2,7 +2,7 @@
 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: 2.0.19
+version: 2.0.20
 
 environment:
   sdk: ">=2.14.0 <3.0.0"