fix: logo getting cropped in landscape mode of login page (commons-app#6106)

* Fixed logo getting cropped in landscape mode of login page

* Indentation added at line 12

* New Dimension created in dimens.xml which is used in land\activity_login.xml

Author: QuantumPineapple68

app/src/main/res/layout-land/activity_login.xml

@@ -12,7 +12,7 @@
         android:layout_width="@dimen/landscape_width"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:layout_marginTop="@dimen/small_gap">
+        android:layout_marginTop="@dimen/login_gap">
 
         <androidx.cardview.widget.CardView
             android:layout_width="match_parent"

app/src/main/res/layout-xlarge/activity_login.xml

@@ -2,12 +2,14 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:layout_gravity="center_vertical">
 
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:orientation="vertical">
+        android:orientation="vertical"
+        android:layout_gravity="center_vertical">
 
         <FrameLayout
             android:layout_width="@dimen/landscape_width"

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

@@ -1,13 +1,15 @@
 <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="wrap_content"
-  android:layout_height="wrap_content">
+  android:layout_height="wrap_content"
+  android:layout_gravity="center_vertical">
 
   <LinearLayout xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:fillViewport="true"
-    android:orientation="vertical">
+    android:orientation="vertical"
+    android:layout_gravity="center_vertical">
 
     <FrameLayout
       android:layout_width="wrap_content"

app/src/main/res/values/dimens.xml

@@ -20,6 +20,7 @@
     <dimen name="gigantic_gap">64dp</dimen>
     <dimen name="standard_gap">16dp</dimen>
     <dimen name="small_gap">8dp</dimen>
+    <dimen name="login_gap">20dp</dimen>
     <dimen name="small_height">7dp</dimen>
     <dimen name="tiny_gap">4dp</dimen>
     <dimen name="very_tiny_gap">2dp</dimen>