feat: add release note about the warning of Android 8 deprecation

Author: jesmrec

owncloudApp/src/main/java/com/owncloud/android/presentation/releasenotes/ReleaseNotesViewModel.kt

@@ -68,6 +68,11 @@ class ReleaseNotesViewModel(
                 subtitle = R.string.release_notes_4_8_0_subtitle_action_to_copy_or_move_destination_folder,
                 type = ReleaseNoteType.ENHANCEMENT
             ),
+            ReleaseNote(
+                title = R.string.release_notes_4_8_0_title_warning_latest_release_sdk28,
+                subtitle = R.string.release_notes_4_8_0_subtitle_warning_latest_release_sdk28,
+                type = ReleaseNoteType.CHANGE
+            ),
             ReleaseNote(
                 title = R.string.release_notes_bugfixes_title,
                 subtitle = R.string.release_notes_bugfixes_subtitle,

owncloudApp/src/main/res/values/strings.xml

@@ -754,6 +754,8 @@
     <string name="release_notes_4_8_0_subtitle_space_public_links">Infinite Scale users can see all public links of a space and manage them with right permissions</string>
     <string name="release_notes_4_8_0_title_action_to_copy_or_move_destination_folder">Navigation to target folder</string>
     <string name="release_notes_4_8_0_subtitle_action_to_copy_or_move_destination_folder">New action to navigate to the destination folder when a file or folder is copied or moved</string>
+    <string name="release_notes_4_8_0_title_warning_latest_release_sdk28">Android 8 last call</string>
+    <string name="release_notes_4_8_0_subtitle_warning_latest_release_sdk28">This version will be the latest one with support for Android 8 and older</string>
 
     <!-- Open in web -->
     <string name="ic_action_open_in_web">Open in web</string>