Widgets compatibility

app/src/main/res/xml-v31/widget.xml

@@ -2,6 +2,8 @@
 <appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
     android:configure="eu.faircode.email.ActivityWidget"
     android:initialLayout="@layout/widget_new"
+    android:minWidth="40dp"
+    android:minHeight="40dp"
     android:previewImage="@drawable/widget_preview_new"
     android:resizeMode="horizontal|vertical"
     android:targetCellWidth="1"

app/src/main/res/xml-v31/widget_sync.xml

@@ -2,6 +2,8 @@
 <appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
     android:configure="eu.faircode.email.ActivityWidgetSync"
     android:initialLayout="@layout/widget_sync"
+    android:minWidth="40dp"
+    android:minHeight="40dp"
     android:previewImage="@drawable/widget_preview_sync"
     android:resizeMode="horizontal|vertical"
     android:targetCellWidth="1"

app/src/main/res/xml-v31/widget_unified.xml

@@ -4,6 +4,8 @@
     android:initialLayout="@layout/widget_unified"
     android:previewImage="@drawable/widget_preview_unified"
     android:resizeMode="horizontal|vertical"
+    android:minWidth="110dp"
+    android:minHeight="110dp"
     android:targetCellWidth="2"
     android:targetCellHeight="2"
     android:updatePeriodMillis="0"