Add an Override_apex_available property for APEX

This property allows an APEX bundle to ignore the apex_available rules
defined in its dependencies, effectively allowing it to use any APEX
as its dependency.

Bug: 269660351
Test: m
Change-Id: Ib2797e04438ad908ac10b256dce07a7819e836b3

apex/apex.go

@@ -141,6 +141,9 @@ type apexBundleProperties struct {
 	// Default: true.
 	Installable *bool
 
+	// Whether this APEX ignores the apex_available list defined in its dependencies.
+	Override_apex_available *bool
+
 	// If set true, VNDK libs are considered as stable libs and are not included in this APEX.
 	// Should be only used in non-system apexes (e.g. vendor: true). Default is false.
 	Use_vndk_as_stable *bool
@@ -1513,6 +1516,10 @@ func (a *apexBundle) UsePlatformApis() bool {
 	return proptools.BoolDefault(a.properties.Platform_apis, false)
 }
 
+func (a *apexBundle) OverrideApexAvailable() bool {
+	return proptools.BoolDefault(a.properties.Override_apex_available, false)
+}
+
 // getCertString returns the name of the cert that should be used to sign this APEX. This is
 // basically from the "certificate" property, but could be overridden by the device config.
 func (a *apexBundle) getCertString(ctx android.BaseModuleContext) string {
@@ -3040,6 +3047,11 @@ func (a *apexBundle) checkApexAvailability(ctx android.ModuleContext) {
 		return
 	}
 
+	// Ignore availability when `override_apex_available` is true.
+	if a.OverrideApexAvailable() {
+		return
+	}
+
 	a.WalkPayloadDeps(ctx, func(ctx android.ModuleContext, from blueprint.Module, to android.ApexModule, externalDep bool) bool {
 		// As soon as the dependency graph crosses the APEX boundary, don't go further.
 		if externalDep {