ERROR: Manifest merger failed : Attribute application@appComponentFactory 오류 처리

ERROR: Manifest merger failed : Attribute application@appComponentFactory value=(android.support.v4.app.CoreComponentFactory) from [com.android.support:support-compat:28.0.0] AndroidManifest.xml:22:18-91
is also present at [androidx.core:core:1.0.0] AndroidManifest.xml:22:18-86 value=(androidx.core.app.CoreComponentFactory).
Suggestion: add ‘tools:replace=”android:appComponentFactory”‘ to  element at AndroidManifest.xml:19:5-57:19 to override.

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apply plugin: ‘com.android.application’

android {
  compileSdkVersion 28
  buildToolsVersion “29.0.0”
  defaultConfig {
   applicationId “ddolcatmaster.smartstepcounter”
   minSdkVersion 19
   targetSdkVersion 28
   versionCode 1
   versionName “1.0”
   testInstrumentationRunner “android.support.test.runner.AndroidJUnitRunner”
}
buildTypes {
 release {
   minifyEnabled false
   proguardFiles getDefaultProguardFile(‘proguard-android-optimize.txt’), ‘proguard-rules.pro’
 }
}
}

dependencies {
 implementation fileTree(dir: ‘libs’, include: [‘*.jar’])
 implementation ‘com.android.support:appcompat-v7:28.0.0’
 implementation ‘com.android.support.constraint:constraint-layout:1.1.3’
 implementation ‘com.google.android.material:material:1.0.0’
 implementation ‘com.google.firebase:firebase-messaging:20.0.1’
 implementation ‘com.google.firebase:firebase-core:17.0.1’
 implementation ‘com.google.firebase:firebase-ads:18.1.1’
 implementation ‘com.google.firebase:firebase-crash:16.2.1’
 implementation ‘androidx.work:work-runtime:2.2.0’
 testImplementation ‘junit:junit:4.12’
 androidTestImplementation ‘com.android.support.test:runner:1.0.2’
 androidTestImplementation ‘com.android.support.test.espresso:espresso-core:3.0.2’
 implementation(‘com.crashlytics.sdk.android:crashlytics:2.10.1@aar’) {
   transitive = true
  }
}

apply plugin: ‘com.google.gms.google-services’
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[해결방법]gradle.properties 파일에 아래 두 줄을 추가 후 다시 빌드를 하면 해결된다.

android.useAndroidX=true
android.enableJetifier=true