Version conflict between gms:play-services-vision and firebase

I've installed both react-native-firebase and react-native-camera. The camera was fine when play-services -vision was stuck at 12.0.1, but I just ran into this error (Error updating property googleVisionBarcodeDetectorEnable) https://github.com/react-native-community/react-native-camera/issues/1844 that requires an upgrade to 15.0.2.

It looks like there are Google Play Services and Firebase conflicts when play-services-vision is bumped up to 15.0.2 from 12.0.1:

Dependency failing: com.google.android.gms:play-services-flags:15.0.1 -> com.google.android.gms:play-services-basement@[
  15.0.1], but play-services-basement version was 16.0.1.

  The following dependencies are project dependencies that are direct or have transitive dependencies that lead to the art
  ifact with the issue.
  -- Project 'app' depends onto com.google.firebase:firebase-messaging@17.3.4
  -- Project 'app' depends onto com.google.android.gms:play-services-base@16.0.1
  -- Project 'app' depends onto com.google.firebase:firebase-core@16.0.6
  -- Project 'app' depends onto com.google.android.gms:play-services-vision@15.0.2

I've tried com.google.android.gms:play-services-vision@16.2.0 but it gave me exceed 64k methods error. Bumping up to 17.0.2 would cause a version conflict from com.google.android.gms:play-services-basement.

Anyone using both react-native-firebase and react-native camera? Can you tell me how to solve this version conflict problem?

Here is the dependencies in android/app/build.gradle

dependencies {

    implementation (project(':react-native-camera')) {
      exclude group: "com.google.android.gms"
      implementation "com.android.support:exifinterface:${rootProject.ext.supportLibVersion}"
      implementation ('com.google.android.gms:play-services-vision:12.0.1') {
        force = true
      }
    }
    implementation project(':react-native-gesture-handler')
    implementation project(':react-native-webview')
    implementation project(':react-native-fast-image')
    implementation project(':react-native-google-signin')
    implementation project(':react-native-firebase')
    implementation 'com.google.firebase:firebase-core:16.0.6'
    implementation ('com.google.android.gms:play-services-base:16.0.1')
    implementation 'com.google.firebase:firebase-messaging:17.3.4'
    implementation('com.crashlytics.sdk.android:crashlytics:2.9.5@aar') {
        transitive = true
    }
    implementation(project(':react-native-google-signin')) {
        exclude group: "com.google.android.gms" // very important
    }
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation "com.android.support:appcompat-v7:${rootProject.ext.supportLibVersion}"
    implementation 'com.facebook.react:react-native:+'
    implementation project(':react-native-sqlite-storage')
    implementation 'me.leolin:ShortcutBadger:1.1.21@aar'
    implementation 'com.facebook.fresco:animated-gif:1.10.0'
}

Ext in android/build.gradle

ext {
    buildToolsVersion = "28.0.3"
    minSdkVersion = 19
    compileSdkVersion = 28
    targetSdkVersion = 28
    supportLibVersion = "27.1.1"
}

Package:

"react-native-camera": "^1.6.4",
"react-native-firebase": "^5.1.1",

from Version conflict between gms:play-services-vision and firebase