CB-14017 (android): Make com.android.support:support-v4 version configurable

[jcesarmobile]

Platforms affected

Android

What does this PR do?

Creates a variable so users can configure the com.android.support:support-v4 version

What testing has been done on this change?

Checklist

• Reported an issue in the JIRA database
• Commit message follows the format: "CB-3232: (android) Fix bug with resolving file paths", where CB-xxxx is the JIRA ID & "android" is the platform affected.
• Added automated test coverage as appropriate for this change.

[thienban]

Hi, i add the cordova-plugin-camera 4.0.3. I want to set 26.1.0 for ANDROID_SUPPORT_V4_VERSION. But I have the ANDROID_SUPPORT_V4_VERSION in 24.1.1. Can you see what to do to add "ANDROID_SUPPORT_V4_VERSION" ?
In config.xml :

    <plugin name="cordova-plugin-camera" spec="4.0.3" source="npm">
        <variable name="CAMERA_USAGE_DESCRIPTION" value="Used to take photos" />
        <variable name="PHOTOLIBRARY_USAGE_DESCRIPTION" value="Used to store photos" />
        <variable name="ANDROID_SUPPORT_V4_VERSION" value="26.1.0" />
    </plugin>

[jcesarmobile]

This doesn’t work on 4.0.3, but a new version has not been released with the fix