Wires up MC to skip host alpha reset

Summary: Wires up MC to skip host alpha reset

Reviewed By: zielinskimz

Differential Revision: D55235512

fbshipit-source-id: 9ea968188412cc2fd81afe6b5597d0eac545238d

litho-core/src/main/java/com/facebook/litho/HostComponent.java

@@ -17,7 +17,6 @@
 package com.facebook.litho;
 
 import android.content.Context;
-import android.os.Build;
 import android.util.SparseArray;
 import androidx.annotation.Nullable;
 import com.facebook.infer.annotation.Nullsafe;
@@ -73,9 +72,9 @@ protected void onMount(
       final @Nullable InterStagePropsContainer interStagePropsContainer) {
     final ComponentHost host = (ComponentHost) convertContent;
 
-    if (Build.VERSION.SDK_INT >= 11) {
-      // We need to do this in case an external user of this ComponentHost has manually set alpha
-      // to 0, which will mean that it won't draw anything.
+    if (!ComponentsConfiguration.skipHostAlphaReset) {
+      // We need to do this in case an external user of this ComponentHost
+      // has manually set alpha to 0, which will mean that it won't draw anything.
       host.setAlpha(1.0f);
     }
 

litho-core/src/main/java/com/facebook/litho/config/ComponentsConfiguration.kt

@@ -240,6 +240,7 @@ internal constructor(
     @JvmField var bindOnSameComponentTree: Boolean = true
     @JvmField var isEventHandlerRebindLoggingEnabled: Boolean = false
     @JvmField var useSafeSpanEndInTextInputSpec: Boolean = false
+    @JvmField var skipHostAlphaReset: Boolean = false
 
     /**
      * This method is only used so that Java clients can have a builder like approach to override a