GH-91 android: Implement the changes in getting serial (Api_level 26):

[selmo47]

* get the serial according to the Api_level:
    + if Api_level < 26:
      => android.os.Build.SERIAL (deprecated in Api_level 26)
    + else:
      => serial = android.os.Build.getSerial(); (introduced in 26)
* add the appropriate permissions:
    + READ_PHONE_STATE
    + READ_PRIVILEGED_PHONE_STATE

Platforms affected

• Android (only)

Motivation and Context

The android 9 introduced some changes in reading crucial device info (https://developer.android.com/about/versions/pie/android-9.0-changes-28), so to get the serial number of a device, you must use getSeial method instead of the 'SERIAL' constante (whoch is depricated), you need also the following permissions
* READ_PHONE_STATE
* READ_PRIVILEGED_PHONE_STATE

Description

Testing

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[breautek]

I don't know if READ_PHONE_STATE permission is sufficient but we cannot accept a PR that adds privileged permissions. See this notice

Caution: Third-party apps installed from the Google Play Store cannot declare privileged permissions.

Therefore READ_PRIVILEGED_PHONE_STATE cannot be used.

[breautek]

Cordova cannot define privileged permissions because that would cause apps to be rejected from the Google Play store.

[SebLevDev]

Up ?

[breautek]

Closing this PR because obtaining the Serial / uuid (as well as any other non-resettable identifier) is no longer possible without privileged permissions.

#111 (comment)