Update Auth sample

- com.google.firebase:firebase-auth:10.2.0
- com.google.android.gms:play-services-base:10.2.0
- replace deprecated code

Author: formatCvt

auth/Classes/FirebaseAuthScene.cpp

@@ -96,13 +96,13 @@ bool FirebaseAuthScene::init() {
   logMessage("Created the Auth %x class for the Firebase app.",
              static_cast<int>(reinterpret_cast<intptr_t>(auth)));
 
-  // It's possible for CurrentUser() to be non-null if the previous run
+  // It's possible for current_user() to be non-null if the previous run
   // left us in a signed-in state.
-  if (auth->CurrentUser() == nullptr) {
+  if (auth->current_user() == nullptr) {
     logMessage("No user signed in at creation time.");
   } else {
     logMessage("Current user %s already signed in, so signing them out.",
-               auth->CurrentUser()->DisplayName().c_str());
+               auth->current_user()->display_name().c_str());
   }
 
   email_text_field_ = createTextField(kEmailPlaceholderText);

auth/app/build.gradle

@@ -6,7 +6,7 @@ android {
 
     defaultConfig {
         applicationId "org.cocos2dx.hellocpp"
-        minSdkVersion 10
+        minSdkVersion 14
         targetSdkVersion 22
         versionCode 1
         versionName "1.0"
@@ -46,8 +46,8 @@ android {
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     compile project(':libcocos2dx')
-    compile 'com.google.firebase:firebase-auth:10.0.1'
-    compile 'com.google.android.gms:play-services-base:10.0.1'
+    compile 'com.google.firebase:firebase-auth:10.2.0'
+    compile 'com.google.android.gms:play-services-base:10.2.0'
 }
 
 apply plugin: 'com.google.gms.google-services'