[android] Fix Android Studio warnings

Signed-off-by: Jean-Baptiste <jeanbaptiste.charron@outlook.fr>

android/sdk/src/main/java/app/organicmaps/sdk/bookmarks/data/ChargeSocketDescriptor.java

@@ -1,7 +1,5 @@
 package app.organicmaps.sdk.bookmarks.data;
 
-import java.text.DecimalFormat;
-
 /**
  * represents the details of the socket available on a particular charging station
  *

android/sdk/src/main/java/app/organicmaps/sdk/bookmarks/data/PredefinedColors.java

@@ -16,7 +16,7 @@ public class PredefinedColors
   public @interface Color
   {}
 
-  /// @note Color format: ARGB
+  /// note Color format: ARGB
   @ColorInt
   private static final int[] PREDEFINED_COLORS = nativeGetPredefinedColors();
 

android/sdk/src/main/java/app/organicmaps/sdk/editor/OsmOAuth.java

@@ -13,19 +13,6 @@ public final class OsmOAuth
 {
   private OsmOAuth() {}
 
-  public enum AuthType
-  {
-    OSM("OSM"),
-    GOOGLE("Google");
-
-    public final String name;
-
-    AuthType(String name)
-    {
-      this.name = name;
-    }
-  }
-
   @SuppressWarnings("NotNullFieldNotInitialized")
   @NonNull
   private static SharedPreferences mPrefs;

android/sdk/src/main/java/app/organicmaps/sdk/util/Constants.java

@@ -32,7 +32,6 @@ public final class Constants
     public static final String OPENING_HOURS_MANUAL = "file:///android_asset/opening_hours_how_to_edit.html";
 
     public static final String OSM_REGISTER = "https://www.openstreetmap.org/user/new";
-    public static final String OSM_RECOVER_PASSWORD = "https://www.openstreetmap.org/user/forgot-password";
 
     private Url() {}
   }

android/sdk/src/main/java/app/organicmaps/sdk/util/Distance.java

@@ -33,7 +33,7 @@ public final class Distance
     }
   }
 
-  /// @todo What is the difference with cpp: kNarrowNonBreakingSpace = "\u202F" ?
+  /// todo What is the difference with cpp: kNarrowNonBreakingSpace = "\u202F" ?
   private static final char NON_BREAKING_SPACE = '\u00A0';
 
   public final double mDistance;