Fix broken links in documentation.

One dead link, causing test to fail.
Several permanent redirects where it is better to use the final destination.

The rest

doc/source/apis.rst

@@ -48,7 +48,7 @@ Requires `Permission.WRITE_EXTERNAL_STORAGE` to read and write to.
 Read more on all the different storage types and what to use them for
 in the Android documentation:
 
-https://developer.android.com/training/data-storage/files
+https://developer.android.com/training/data-storage
 
 A note on permissions
 ~~~~~~~~~~~~~~~~~~~~~
@@ -441,5 +441,5 @@ sometimes a little more involved, particularly if making Java classes
 from Python code), but it's not Pythonic and it's not short. These are
 problems that Plyer, explained below, attempts to address.
 
-You can check the `Pyjnius documentation <https://pyjnius.readthedocs.io/en/stable/>`_ for further details.
+You can check the `Pyjnius documentation <https://pyjnius.readthedocs.io/en/latest/>`_ for further details.
 

doc/source/services.rst

@@ -15,7 +15,7 @@ the ``android:process`` attribute of the ``AndroidManifest.xml`` file.
 This is not the default behavior, see `Android service documentation
 <https://developer.android.com/guide/topics/manifest/service-element>`__.
 You can communicate with the service process from your app using e.g.
-`osc <https://pypi.python.org/pypi/python-osc>`__ or (a heavier option)
+`osc <https://pypi.org/project/python-osc/>`__ or (a heavier option)
 `twisted <https://twisted.org/>`__.
 
 Service creation

doc/source/troubleshooting.rst

@@ -12,7 +12,7 @@ in the compilation and packaging steps.
 
 If reporting a problem by email or Discord, it is usually helpful to
 include this full log, e.g. via a `pastebin
-<http://paste.ubuntu.com/>`_ or `Github gist
+<https://pastebin.ubuntu.com/>`_ or `Github gist
 <https://gist.github.com/>`_.
 
 Getting help
@@ -66,7 +66,7 @@ devices`` to get the list of connected devices.
 For further information, see the Android docs on `adb
 <https://developer.android.com/tools/adb>`_, and
 on `logcat
-<https://developer.android.com/studio/command-line/logcat>`_ in
+<https://developer.android.com/tools/logcat>`_ in
 particular.
 
 Unpacking an APK