UI: Fix some derps with fontFamily

It also fixes preview in android studio

Signed-off-by: IacobIonut01 <paulionut2003@gmail.com>

Author: IacobIonut01

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

@@ -28,7 +28,6 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_margin="28dp"
-                android:fontFamily="google-sans-medium"
                 android:text="@string/app_name"
                 android:textColor="?android:textColorPrimary"
                 android:textSize="24sp"

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

@@ -17,7 +17,6 @@
     <TextView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:fontFamily="google-sans-medium"
         android:paddingStart="28dp"
         android:paddingTop="7dp"
         android:paddingEnd="28dp"

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

@@ -76,14 +76,14 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginTop="8dp"
-        android:fontFamily="google-sans-medium"
         android:paddingStart="18dp"
         android:paddingTop="14dp"
         android:paddingEnd="18dp"
         android:paddingBottom="14dp"
         android:text="@string/built_in_wallpapers"
         android:textColor="?android:attr/textColorSecondary"
-        android:textSize="22sp" />
+        android:textSize="22sp"
+        android:textStyle="bold" />
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/builtInRecycler"
@@ -99,14 +99,14 @@
         <TextView
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:fontFamily="google-sans-medium"
             android:paddingStart="18dp"
             android:paddingTop="14dp"
             android:paddingEnd="18dp"
             android:paddingBottom="14dp"
             android:text="@string/dotos_exclusives"
             android:textColor="?android:attr/textColorSecondary"
             android:textSize="22sp"
+            android:textStyle="bold"
             app:drawableEndCompat="@drawable/drag_handle" />
 
         <androidx.recyclerview.widget.RecyclerView