Ignore AlwaysShowAction lint issue. Also make it an error, so that developer has to explicitly disable the warning.

library/ui-styles/src/debug/res/menu/menu_debug.xml

@@ -14,6 +14,7 @@
         android:id="@+id/menuDebug2"
         android:icon="@drawable/ic_debug_icon"
         android:title="Send"
-        app:showAsAction="always" />
+        app:showAsAction="always"
+        tools:ignore="AlwaysShowAction" />
 
 </menu>

tools/lint/lint.xml

@@ -19,6 +19,9 @@
     <issue id="IconExpectedSize" severity="error" />
     <issue id="LocaleFolder" severity="error" />
 
+    <!-- AlwaysShowAction is considered as an error to force ignoring the issue when detected -->
+    <issue id="AlwaysShowAction" severity="error" />
+
     <issue id="TooManyViews" severity="warning">
         <!-- Ignore TooManyViews in debug build type -->
         <ignore path="**/src/debug/**" />

vector/src/main/java/im/vector/app/features/home/room/detail/TimelineFragment.kt

@@ -1124,6 +1124,7 @@ class TimelineFragment :
                         .findViewById<ImageView>(R.id.action_view_icon_image)
                         .setColorFilter(colorProvider.getColorFromAttribute(R.attr.colorPrimary))
                 actionView.findViewById<TextView>(R.id.cart_badge).setTextOrHide("$widgetsCount")
+                @Suppress("AlwaysShowAction")
                 matrixAppsMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS)
             }
 

vector/src/main/res/menu/menu_home.xml

@@ -34,6 +34,7 @@
         android:icon="@drawable/ic_filter"
         android:title="@string/home_filter_placeholder_home"
         app:iconTint="?vctr_content_secondary"
-        app:showAsAction="always" />
+        app:showAsAction="always"
+        tools:ignore="AlwaysShowAction" />
 
 </menu>

vector/src/main/res/menu/menu_manage_space.xml

@@ -1,12 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto">
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools">
 
     <item
         android:id="@+id/action_delete"
         android:icon="@drawable/ic_delete_unsent_messages"
         android:title="@string/action_delete"
-        app:showAsAction="always" />
+        app:showAsAction="always"
+        tools:ignore="AlwaysShowAction" />
 
     <item
         android:id="@+id/action_mark_as_suggested"