Support reading Providers from TransitionMutator IncomingTransition and OutgoingTransition

Add a provider method to IncomingTransitionContext and
OutgoingTransitionContext so they implement ModuleProviderContext
and can be passed to android.ModuleProvider.

Bug: 319288033
Test: go test ./...
Change-Id: Ibf8b0feb78e4062fc044c321a23adcb68373e2f8

android/mutator.go

@@ -391,6 +391,7 @@ func (x *registerMutatorsContext) BottomUpBlueprint(name string, m blueprint.Bot
 
 type IncomingTransitionContext interface {
 	ArchModuleContext
+	ModuleProviderContext
 
 	// Module returns the target of the dependency edge for which the transition
 	// is being computed
@@ -404,6 +405,7 @@ type IncomingTransitionContext interface {
 
 type OutgoingTransitionContext interface {
 	ArchModuleContext
+	ModuleProviderContext
 
 	// Module returns the target of the dependency edge for which the transition
 	// is being computed
@@ -538,6 +540,10 @@ func (c *outgoingTransitionContextImpl) DeviceConfig() DeviceConfig {
 	return DeviceConfig{c.bp.Config().(Config).deviceConfig}
 }
 
+func (c *outgoingTransitionContextImpl) provider(provider blueprint.AnyProviderKey) (any, bool) {
+	return c.bp.Provider(provider)
+}
+
 func (a *androidTransitionMutator) OutgoingTransition(bpctx blueprint.OutgoingTransitionContext, sourceVariation string) string {
 	if m, ok := bpctx.Module().(Module); ok {
 		ctx := outgoingTransitionContextPool.Get().(*outgoingTransitionContextImpl)
@@ -569,6 +575,10 @@ func (c *incomingTransitionContextImpl) DeviceConfig() DeviceConfig {
 	return DeviceConfig{c.bp.Config().(Config).deviceConfig}
 }
 
+func (c *incomingTransitionContextImpl) provider(provider blueprint.AnyProviderKey) (any, bool) {
+	return c.bp.Provider(provider)
+}
+
 func (a *androidTransitionMutator) IncomingTransition(bpctx blueprint.IncomingTransitionContext, incomingVariation string) string {
 	if m, ok := bpctx.Module().(Module); ok {
 		ctx := incomingTransitionContextPool.Get().(*incomingTransitionContextImpl)