【Cordova】twilio-client-phonegap-pluginのインストールでハマったのでメモ

* What went wrong:
Execution failed for task ':app:processReleaseManifest'.
> Manifest merger failed : Attribute application@appComponentFactory value=(androidx.core.app.CoreComponentFactory) from [androidx.core:core:1.0.0] AndroidManifest.xml:22:18-86
        is also present at [com.android.support:support-compat:28.0.0] AndroidManifest.xml:22:18-91 value=(android.support.v4.app.CoreComponentFactory).
        Suggestion: add 'tools:replace="android:appComponentFactory"' to <application> element at AndroidManifest.xml:5:5-34:19 to override.

> Error: java.util.concurrent.ExecutionException: com.android.tools.aapt2.Aapt2Exception: AAPT2 error: check logs for details
（略）
resource android:attr/fontVariationSettings not found

# 修正前
classpath 'com.android.tools.build:gradle:3.0.1'
# 修正後
classpath 'com.android.tools.build:gradle:3.2.0-alpha13'

* What went wrong:
A problem occurred evaluating project ':CordovaLib'.
> Failed to apply plugin [id 'com.android.library']
   > Minimum supported Gradle version is 4.6. Current version is 4.1. If using the gradle wrapper, try editing the distributionUrl in hoge/gradle/wrapper/gradle-wrapper.properties to gradle-4.6-all.zip

# 修正前：
var distributionUrl = process.env['CORDOVA_ANDROID_GRADLE_DISTRIBUTION_URL'] || 'https\\://services.gradle.org/distributions/gradle-4.1-all.zip';
# 修正前：
var distributionUrl = process.env['CORDOVA_ANDROID_GRADLE_DISTRIBUTION_URL'] || 'https\\://services.gradle.org/distributions/gradle-4.6-all.zip';

* What went wrong:
Execution failed for task ':app:processReleaseResources'.
> Android resource linking failed
  Output:  platforms/android/app/build/intermediates/incremental/mergeReleaseResources/merged.dir/values/values.xml:221: error: resource android:attr/fontVariationSettings not found.
  platforms/android/app/build/intermediates/incremental/mergeReleaseResources/merged.dir/values/values.xml:221: error: resource android:attr/ttcIndex not found.
  error: failed linking references.

# 修正前
cdvCompileSdkVersion = null;
# 修正後
cdvCompileSdkVersion = 28;

* What went wrong:
Execution failed for task ':app:compileReleaseJavaWithJavac'.
> Compilation failed; see the compiler error output for details.
(略)
BUILD FAILED in 2s
27 actionable tasks: 2 executed, 25 up-to-date
/platforms/android/gradlew: Command failed with exit code 1 Error output:
/platforms/android/app/src/main/java/com/gae/scaffolder/plugin/MyFirebaseInstanceIDService.java:6: エラー: シンボルを見つけられません
import com.google.firebase.iid.FirebaseInstanceIdService;
                              ^