chore(deps): bump volley from 1.2.0 to 1.2.1 in /ApiDemos/java (#683)

Bumps [volley](https://github.com/google/volley) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/google/volley/releases)
- [Commits](https://github.com/google/volley/compare/1.2.0...1.2.1)

---
updated-dependencies:
- dependency-name: com.android.volley:volley
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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ApiDemos/java/app/build.gradle

@@ -46,7 +46,7 @@ dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation "androidx.recyclerview:recyclerview:1.2.1"
-    implementation 'com.android.volley:volley:1.2.0'
+    implementation 'com.android.volley:volley:1.2.1'
 
     // GMS
     gmsImplementation 'com.google.android.gms:play-services-maps:17.0.1'