Android: added German translation

[marcnause]

I have added a German translation for the strings in the Android app.

[jendib]

That's awesome! Thanks! :+1:

[jendib]

Oops, I just have a small Lint error, if you can look into it please:

:app:lintVitalRelease/var/jenkins_home/jobs/Reader_Android/workspace/reader-android/app/src/main/AndroidManifest.xml:72: Error: Resources referenced from the manifest cannot vary by configuration (except for version qualifiers, e.g. -v21.) Found variation in de [ManifestResource]
            <meta-data android:name="description" android:value="@string/extension_description" />
                                                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    /var/jenkins_home/jobs/Reader_Android/workspace/reader-android/app/src/main/res/values-de/strings.xml:49: This value will not be used

   Explanation for issues of type "ManifestResource":
   Elements in the manifest can reference resources, but those resources
   cannot vary across configurations (except as a special case, by version,
   and except for a few specific package attributes such as the application
   title and icon.)

/var/jenkins_home/jobs/Reader_Android/workspace/reader-android/app/src/main/res/values/arrays.xml:4: Error: "articlesFetched" is not translated in "de" (German) [MissingTranslation]
    <string-array name="articlesFetched">
                  ~~~~~~~~~~~~~~~~~~~~~~
/var/jenkins_home/jobs/Reader_Android/workspace/reader-android/app/src/main/res/values/arrays.xml:17: Error: "defaultSubscriptionsValues" is not translated in "de" (German) [MissingTranslation]
    <string-array name="defaultSubscriptionsValues">
                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/var/jenkins_home/jobs/Reader_Android/workspace/reader-android/app/src/main/res/values/arrays.xml:28: Error: "fontSizeValues" is not translated in "de" (German) [MissingTranslation]
    <string-array name="fontSizeValues">
                  ~~~~~~~~~~~~~~~~~~~~~

   Explanation for issues of type "MissingTranslation":
   If an application has more than one locale, then all the strings declared
   in one language should also be translated in all other languages.

   If the string should not be translated, you can add the attribute
   translatable="false" on the <string> element, or you can define all your
   non-translatable strings in a resource file called donottranslate.xml. Or,
   you can ignore the issue with a tools:ignore="MissingTranslation"
   attribute.

   By default this detector allows regions of a language to just provide a
   subset of the strings and fall back to the standard language strings. You
   can require all regions to provide a full translation by setting the
   environment variable ANDROID_LINT_COMPLETE_REGIONS.

   You can tell lint (and other tools) which language is the default language
   in your res/values/ folder by specifying tools:locale="languageCode" for
   the root <resources> element in your resource file. (The tools prefix
   refers to the namespace declaration http://schemas.android.com/tools.)

4 errors, 0 warnings
 FAILED

[marcnause]

My bad! I will create a new pull request for the changes that should remove the warnings above.