Update moe equivalence

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=207556225

demos/retriever/README.md

@@ -1,4 +0,0 @@
-# Exo Retriever demo application #
-
-This folder contains a demo application that showcases usage of ExoPlayer's
-Metadata and Frame Retrieval APIs.

demos/retriever/build.gradle

@@ -1,57 +0,0 @@
-// Copyright (C) 2018 The Android Open Source Project
-//
-// 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.
-apply from: '../../constants.gradle'
-apply plugin: 'com.android.application'
-
-android {
-    compileSdkVersion project.ext.compileSdkVersion
-    buildToolsVersion project.ext.buildToolsVersion
-
-    compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
-    }
-
-    defaultConfig {
-        versionName project.ext.releaseVersion
-        versionCode project.ext.releaseVersionCode
-        minSdkVersion 16
-        targetSdkVersion project.ext.targetSdkVersion
-    }
-
-    buildTypes {
-        release {
-            shrinkResources true
-            minifyEnabled true
-            proguardFiles getDefaultProguardFile('proguard-android.txt')
-        }
-        debug {
-            jniDebuggable = true
-        }
-    }
-
-    lintOptions {
-        // The demo app does not have translations.
-        disable 'MissingTranslation'
-    }
-}
-
-dependencies {
-    implementation project(modulePrefix + 'library-core')
-    implementation project(modulePrefix + 'library-ui')
-    implementation project(modulePrefix + 'library-dash')
-    implementation project(modulePrefix + 'library-hls')
-    implementation project(modulePrefix + 'library-smoothstreaming')
-    implementation 'com.android.support:support-annotations:' + supportLibraryVersion
-}

settings.gradle

@@ -25,7 +25,6 @@ include modulePrefix + 'playbacktests'
 project(modulePrefix + 'demo').projectDir = new File(rootDir, 'demos/main')
 project(modulePrefix + 'demo-cast').projectDir = new File(rootDir, 'demos/cast')
 project(modulePrefix + 'demo-ima').projectDir = new File(rootDir, 'demos/ima')
-project(modulePrefix + 'demo-retriever').projectDir = new File(rootDir, 'demos/retriever')
 project(modulePrefix + 'playbacktests').projectDir = new File(rootDir, 'playbacktests')
 
 apply from: 'core_settings.gradle'