[공통][Common] 앱이름 flavor 별로 처리

- 패키지를 구분해서 app.xml 파일을 생성

app/build.gradle

@@ -44,7 +44,7 @@ android {
     productFlavors {
         dev {
             versionNameSuffix "-dev"
-            manifestPlaceholders = [appLabel: "@string/app_name_dev"]
+            manifestPlaceholders = [appLabel: "@string/app_name"]
         }
         product {
             versionNameSuffix ""

app/src/dev/res/values/app.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <string name="app_name" translatable="false">Lifeplus - dev</string>
+</resources>

app/src/main/res/values/strings.xml

@@ -1,8 +1,4 @@
 <resources>
-
-  <string name="app_name_dev" translatable="false">Lifeplus - dev</string>
-  <string name="app_name" translatable="false">Lifeplus</string>
-
   <string name="empty_string" translatable="false"/>
 
   <string name="sign_up_hello_text">Lifeplus 회원가입을 하시면 다양한 혜택을 누릴 수 있어요.</string>

app/src/product/res/values/app.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <string name="app_name" translatable="false">Lifeplus</string>
+</resources>