Add a Make variable that overrides configured jar locations.

We had hardcoded logic to override "framework-minus-apex", but we need
to override more jars, so this CL adds a general solution for this.

Bug: 290583827
Test: m nothing
Change-Id: I211ebda7aa2803886ab6e6d081d26327665e49a6

java/dexpreopt_bootjars.go

@@ -386,7 +386,7 @@ func (image bootImageConfig) moduleName(ctx android.PathContext, idx int) string
 	m := image.modules.Jar(idx)
 	name := image.stem
 	if idx != 0 || image.extends != nil {
-		name += "-" + android.ModuleStem(m)
+		name += "-" + android.ModuleStem(ctx.Config(), image.modules.Apex(idx), m)
 	}
 	return name
 }