Bump espresso-core from 3.1.1 to 3.2.0 (#1377)

Bumps espresso-core from 3.1.1 to 3.2.0.

mobile/build.gradle

@@ -147,7 +147,7 @@ dependencies {
     testImplementation 'org.powermock:powermock-module-junit4:2.0.2'
 
     // Espresso UI tests
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1', {
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0', {
         exclude group: 'com.android.support', module: 'support-annotations'
     }
     androidTestImplementation 'androidx.test:runner:1.2.0'