title: Unresolved reference @HiltAndroidApp or any other Hilt annotation in Android
body: <p>I have done everything properly but still, I can't use Hilt in my project.</p>
  
  <p><strong>build.gradle(:app)</strong></p>
  
  <pre><code>apply plugin: 'com.android.application'
  apply plugin: 'kotlin-android'
  apply plugin: 'kotlin-android-extensions'
  apply plugin: 'com.google.gms.google-services'
  apply plugin: 'com.google.firebase.crashlytics'
  apply plugin: 'kotlin-kapt'
  apply plugin: 'dagger.hilt.android.plugin'
  
  android {
      compileSdkVersion 29
      buildToolsVersion "29.0.3"
  
  
      buildFeatures{
          viewBinding = true
          dataBinding = true
      }
  
  
  
      defaultConfig {
          applicationId "com.emptysheet.pdfreader_autoscroll"
          minSdkVersion 16
          targetSdkVersion 29
          versionCode 7
          versionName "1.7"
          multiDexEnabled true
  
          testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
      }
  
      buildTypes {
          release {
              minifyEnabled true
              proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
          }
      }
  
  // To inline the bytecode built with JVM target 1.8 into
  // bytecode that is being built with JVM target 1.6. (e.g. navArgs)
  
  
      compileOptions {
          sourceCompatibility JavaVersion.VERSION_1_8
          targetCompatibility JavaVersion.VERSION_1_8
      }
      kotlinOptions {
          jvmTarget = "1.8"
      }
  
  }
  
  dependencies {
      implementation fileTree(dir: 'libs', include: ['*.jar'])
      implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
      implementation 'androidx.appcompat:appcompat:1.1.0'
      implementation 'androidx.core:core-ktx:1.3.0'
      implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
      implementation 'com.google.android.material:material:1.1.0'
      implementation 'androidx.preference:preference:1.1.1'
      implementation 'androidx.legacy:legacy-support-v4:1.0.0'
      implementation 'androidx.navigation:navigation-fragment:2.2.2'
      implementation 'androidx.navigation:navigation-ui:2.2.2'
      implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
      implementation 'androidx.navigation:navigation-fragment-ktx:2.2.2'
      implementation 'androidx.navigation:navigation-ui-ktx:2.2.2'
      testImplementation 'junit:junit:4.12'
      androidTestImplementation 'androidx.test.ext:junit:1.1.1'
      androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
  
      implementation project(path: ':android-pdf-viewer')
  
      //firebase for crashlytics
      implementation 'com.google.firebase:firebase-analytics-ktx:17.4.3'
      implementation 'com.google.firebase:firebase-crashlytics:17.0.1'
      // for ads
      implementation 'com.google.android.gms:play-services-ads:19.1.0'
      // multidex
      //room
      implementation 'androidx.room:room-ktx:2.2.5'
      kapt "androidx.room:room-compiler:2.2.5"
  
      implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.7"
      implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.0"
      //debug database
      debugImplementation 'com.amitshekhar.android:debug-db:1.0.6'
      implementation 'de.psdev.licensesdialog:licensesdialog:2.1.0'
      //support for APK less than 21
      implementation 'androidx.multidex:multidex:2.0.1'
      // in app billing
      implementation 'com.android.billingclient:billing-ktx:3.0.0'
      // Hilt
      implementation "com.google.dagger:hilt-android:2.28-alpha"
      kapt "com.google.dagger:hilt-android-compiler:2.28-alpha"
  
  }
  </code></pre>
  
  <p><strong>build.gradle(Project)</strong></p>
  
  <pre><code>// Top-level build file where you can add configuration options common to all sub-projects/modules.
  
  buildscript {
      ext.kotlin_version = '1.3.72'
      repositories {
          google()
          jcenter()
  
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:4.0.0'
          classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
          classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
          classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.7.3'
          classpath 'com.google.gms:google-services:4.3.3'
          classpath 'com.google.firebase:firebase-crashlytics-gradle:2.1.1'
          classpath 'com.google.dagger:hilt-android-gradle-plugin:2.28-alpha'
  
  
          // NOTE: Do not place your application dependencies here; they belong
          // in the individual module build.gradle files
      }
  }
  
  allprojects {
      repositories {
          google()
          jcenter()
  
      }
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
  }
  </code></pre>
  
  <p>When I am using <code>@HiltAndroidApp</code> or any other Hilt annotation. It says Unresolved reference. Create annotation. I have tried re-installing Hilt but it's still not working. </p>
  
  <p>I am also using <strong>Android Studio 4.0</strong> </p>