Set default textInputStyle (fixes #2926)

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

@@ -9,7 +9,6 @@
 
     <com.google.android.material.textfield.TextInputLayout
         android:id="@+id/username_label"
-        style="@style/Theme.Widget.TextInputLayout.OutlinedBox"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:hint="@string/username">
@@ -22,7 +21,6 @@
     </com.google.android.material.textfield.TextInputLayout>
 
     <com.google.android.material.textfield.TextInputLayout
-        style="@style/Theme.Widget.TextInputLayout.OutlinedBox"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:hint="@string/password">

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

@@ -56,6 +56,7 @@
         <item name="buttonStyle">@style/Theme.Widget.Button.Outlined.Accent</item>
         <item name="snackbarButtonStyle">@style/Theme.Widget.Button</item>
         <item name="textAppearanceButton">@style/TextAppearance.Widget.Button</item>
+        <item name="textInputStyle">@style/Theme.Widget.TextInputLayout.OutlinedBox</item>
         <item name="android:itemTextAppearance">@style/TextAppearance.Widget.Menu</item>
 
         <!-- Material Dialogs -->
@@ -137,6 +138,7 @@
         <item name="snackbarStyle">@style/Theme.Widget.Snackbar</item>
         <item name="snackbarButtonStyle">@style/Theme.Widget.Button</item>
         <item name="textAppearanceButton">@style/TextAppearance.Widget.Button</item>
+        <item name="textInputStyle">@style/Theme.Widget.TextInputLayout.OutlinedBox</item>
         <item name="android:itemTextAppearance">@style/TextAppearance.Widget.Menu</item>
 
         <!-- Material Dialogs -->