Revert "Deduplicate APEX variants that would build identically"

This reverts commit d6b2525b00.

Reason for revert: <Breaks tests - confirmed by Forrest: b/165188843>

Change-Id: I7cb68cb87522415004390c0672dc774e0067b122

cc/cc.go

@@ -2390,7 +2390,7 @@ func (c *Module) depsToPaths(ctx android.ModuleContext) PathDeps {
 			if ccDep.CcLibrary() && !libDepTag.static() {
 				depIsStubs := ccDep.BuildStubs()
 				depHasStubs := VersionVariantAvailable(c) && ccDep.HasStubsVariants()
-				depInSameApexes := android.DirectlyInAllApexes(c.InApexes(), depName)
+				depInSameApex := android.DirectlyInApex(c.ApexVariationName(), depName)
 				depInPlatform := !android.DirectlyInAnyApex(ctx, depName)
 
 				var useThisDep bool
@@ -2420,9 +2420,9 @@ func (c *Module) depsToPaths(ctx android.ModuleContext) PathDeps {
 						}
 					}
 				} else {
-					// If building for APEX, use stubs when the parent is in any APEX that
-					// the child is not in.
-					useThisDep = (depInSameApexes != depIsStubs)
+					// If building for APEX, use stubs only when it is not from
+					// the same APEX
+					useThisDep = (depInSameApex != depIsStubs)
 				}
 
 				// when to use (unspecified) stubs, check min_sdk_version and choose the right one
@@ -2895,16 +2895,6 @@ func (c *Module) TestFor() []string {
 	}
 }
 
-func (c *Module) UniqueApexVariations() bool {
-	if u, ok := c.compiler.(interface {
-		uniqueApexVariations() bool
-	}); ok {
-		return u.uniqueApexVariations()
-	} else {
-		return false
-	}
-}
-
 // Return true if the module is ever installable.
 func (c *Module) EverInstallable() bool {
 	return c.installer != nil &&