Fix logo in password UI

app/src/main/res/color/long_shadow.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android" >
+    <item android:color="@color/transparent"/>
+</selector>

app/src/main/res/layout/activity_password.xml

@@ -59,16 +59,15 @@
                 <FrameLayout
                     android:layout_width="match_parent"
                     android:layout_height="match_parent"
-                    android:minHeight="148dp"
+                    android:minHeight="144dp"
                     android:layout_marginTop="?attr/actionBarSize">
                     <ImageView
-                        android:layout_width="78dp"
-                        android:layout_height="78dp"
+                        android:layout_width="96dp"
+                        android:layout_height="96dp"
                         android:layout_gravity="center"
+                        android:padding="0dp"
                         android:contentDescription="@string/about"
-                        android:src="@mipmap/ic_launcher"
-                        android:background="@drawable/background_image_button"
-                        android:backgroundTint="?attr/colorPrimaryDark"/>
+                        android:src="@drawable/ic_launcher_foreground"/>
                     <FrameLayout
                         android:layout_width="match_parent"
                         android:layout_height="match_parent">