Add firebase-config sample app for SDK size test. (#624)

* Add firebase-config sample app for SDK size test.

Author: rlazo

tools/measurement/apksize/apksize.gradle

@@ -25,6 +25,7 @@ apply from: "src/database/database.gradle"
 apply from: "src/storage/storage.gradle"
 apply from: "src/firestore/firestore.gradle"
 apply from: "src/functions/functions.gradle"
+apply from: "src/config/config.gradle"
 
 /**
  * This task builds all supported variants (only aggressive as of writing) and writes the

tools/measurement/apksize/sdks.csv

@@ -6,3 +6,5 @@ functions-aggressive:2
 storage-aggressive:3
 functions-release:6
 storage-release:7
+config-aggressive:9
+config-release:10

tools/measurement/apksize/src/config/config.gradle

@@ -0,0 +1,33 @@
+// Copyright 2018 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+android {
+    productFlavors {
+        config {
+            dimension "apkSize"
+            applicationId "com.google.apksize.config"
+        }
+    }
+    sourceSets {
+        config {
+            java.srcDirs = [
+                "src/config/java",
+            ]
+        }
+    }
+}
+dependencies {
+    configImplementation project(":firebase-config")
+}

tools/measurement/apksize/src/config/java/com.google.apksize/Config.java

@@ -0,0 +1,41 @@
+// Copyright 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.apksize;
+
+import android.content.Context;
+import com.google.firebase.remoteconfig.FirebaseRemoteConfig;
+import com.google.firebase.remoteconfig.FirebaseRemoteConfigSettings;
+
+public class Config implements SampleCode {
+  private static final String MESSAGE_TAG = "message";
+  private static final String FLAG_TAG = "flag";
+  private static final String NUMBER_TAG = "number";
+
+  @Override
+  public void runSample(Context context) {
+    FirebaseRemoteConfig remoteConfig = FirebaseRemoteConfig.getInstance();
+    FirebaseRemoteConfigSettings settings =
+        new FirebaseRemoteConfigSettings.Builder()
+            .setDeveloperModeEnabled(BuildConfig.DEBUG)
+            .setMinimumFetchIntervalInSeconds(3600)
+            .build();
+    remoteConfig.setConfigSettings(settings);
+    remoteConfig.setDefaults(R.xml.remote_config_defaults);
+
+    remoteConfig.getString(MESSAGE_TAG);
+    remoteConfig.getBoolean(FLAG_TAG);
+    remoteConfig.getDouble(NUMBER_TAG);
+  }
+}

tools/measurement/apksize/src/config/java/com.google.apksize/SampleCodeLoader.java

@@ -0,0 +1,24 @@
+// Copyright 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.apksize;
+
+import android.content.Context;
+
+public class SampleCodeLoader {
+
+  public void runSamples(Context context) {
+    new Config().runSample(context);
+  }
+}

tools/measurement/apksize/src/main/res/xml/remote_config_defaults.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<defaultsMap>
+    <entry>
+        <key>message</key>
+        <value>My custom message</value>
+    </entry>
+    <entry>
+        <key>flag</key>
+        <value>false</value>
+    </entry>
+    <entry>
+        <key>number</key>
+        <value>3.14159</value>
+    </entry>
+</defaultsMap>