Adapt library for AndroidX

[uburoiubu]

When building this library in modern AndroidX environment, there are dependency resolution errors, as such:

Duplicate class android.support.v4.app.INotificationSideChannel found in modules core-1.6.0-runtime (androidx.core:core:1.6.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.app.INotificationSideChannel$Stub found in modules core-1.6.0-runtime (androidx.core:core:1.6.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.app.INotificationSideChannel$Stub$Proxy found in modules core-1.6.0-runtime (androidx.core:core:1.6.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.IResultReceiver found in modules core-1.6.0-runtime (androidx.core:core:1.6.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.IResultReceiver$Stub found in modules core-1.6.0-runtime (androidx.core:core:1.6.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.IResultReceiver$Stub$Proxy found in modules core-1.6.0-runtime (androidx.core:core:1.6.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.ResultReceiver found in modules core-1.6.0-runtime (androidx.core:core:1.6.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.ResultReceiver$1 found in modules core-1.6.0-runtime (androidx.core:core:1.6.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.ResultReceiver$MyResultReceiver found in modules core-1.6.0-runtime (androidx.core:core:1.6.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)
Duplicate class android.support.v4.os.ResultReceiver$MyRunnable found in modules core-1.6.0-runtime (androidx.core:core:1.6.0) and support-compat-27.1.1-runtime (com.android.support:support-compat:27.1.1)

There is a way to fix it by enabling jettifier. It would be much better if these issues were fixed at the library level. @gregcockroft, please consider adapting your very helpful library to AndroidX.

[Aiushtha]

hi ,you can add. 'android.enableJetifier=true'. in. gradle.properties

[iGuru-iOS]

Added 'android.enableJetifier=true but same exception .