Updated locations of nearly all files

This has been done in preparations for rewrite to kotlin and upcoming design changes.
Nothing should be broken but use caution.

app/src/main/java/com/topjohnwu/magisk/view/SnackbarMaker.java

@@ -0,0 +1,48 @@
+package com.topjohnwu.magisk.view;
+
+import android.app.Activity;
+import android.net.Uri;
+import android.view.View;
+import android.widget.TextView;
+
+import com.google.android.material.snackbar.Snackbar;
+import com.topjohnwu.magisk.R;
+import com.topjohnwu.magisk.utils.Utils;
+
+import androidx.annotation.StringRes;
+
+public class SnackbarMaker {
+
+    public static Snackbar make(Activity activity, CharSequence text, int duration) {
+        View view = activity.findViewById(android.R.id.content);
+        return make(view, text, duration);
+    }
+
+    public static Snackbar make(Activity activity, @StringRes int resId, int duration) {
+        return make(activity, activity.getString(resId), duration);
+    }
+
+    public static Snackbar make(View view, CharSequence text, int duration) {
+        Snackbar snack = Snackbar.make(view, text, duration);
+        setup(snack);
+        return snack;
+    }
+
+    public static Snackbar make(View view, @StringRes int resId, int duration) {
+        Snackbar snack = Snackbar.make(view, resId, duration);
+        setup(snack);
+        return snack;
+    }
+
+    private static void setup(Snackbar snack) {
+        TextView text = snack.getView().findViewById(com.google.android.material.R.id.snackbar_text);
+        text.setMaxLines(Integer.MAX_VALUE);
+    }
+
+    public static void showUri(Activity activity, Uri uri) {
+        make(activity, activity.getString(R.string.internal_storage,
+                "/Download/" + Utils.getNameFromUri(activity, uri)),
+                Snackbar.LENGTH_LONG)
+                .setAction(R.string.ok, (v)->{}).show();
+    }
+}