Remove service-compiler related code.

samples/todomvc/android/TodoMVC/app/build.gradle

-apply plugin: 'com.android.application'
-
-android {
-    compileSdkVersion 21
-    buildToolsVersion "21.1.2"
-
-    defaultConfig {
-        applicationId "com.google.dartino.todomvc"
-        minSdkVersion 15
-        targetSdkVersion 21
-        versionCode 1
-        versionName "1.0"
-    }
-    buildTypes {
-        release {
-            minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
-        }
-    }
-}
-
-dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:21.0.3'
-}