Revert "bp2build: convert host & prebuilt header libraries"

This reverts commit d8a72d7dc9.

Reason for revert: root cause for b/214013899

Change-Id: If769708408c419c2fd3d9484fbf40202b7276299

cc/cc.go

@@ -3476,7 +3476,9 @@ func (c *Module) ConvertWithBp2build(ctx android.TopDownMutatorContext) {
 				libraryBp2Build(ctx, c)
 			}
 		} else if !static && !shared {
-			libraryHeadersBp2Build(ctx, c)
+			if !prebuilt {
+				libraryHeadersBp2Build(ctx, c)
+			}
 		} else if static {
 			if prebuilt {
 				prebuiltLibraryStaticBp2Build(ctx, c)