[공통][Common] Sandbox 적용 Class 변경 LifeplusAPIRepository -> LifeplusAPIService, NetworkWatcher 2

app/build.gradle

@@ -45,7 +45,7 @@ android {
     sourceSets {
         /*
         - dev / product = NetworkConfig 를 다르게 설정
-        - sandbox / common = LifeplusAPIRepository 를 설정
+        - sandbox / common = sandbox 로 사용할 Class 를 설정
          */
         sandbox {
             java.srcDirs = ['src/dev/java', 'src/sandbox/java']