Add min_sdk_version to Rust modules.

Add the min_sdk_version property to Rust modules so they can declare
a minimum SDK version they support for use with APEX modules.

Test: New Soong test passes.
Bug: 174862583
Change-Id: I2829053a320f50c218783dee5adbeff9cef81e8e

apex/apex_test.go

@@ -1782,6 +1782,31 @@ func TestApexMinSdkVersion_ErrorIfIncompatibleVersion(t *testing.T) {
 			min_sdk_version: "30",
 		}
 	`)
+
+	testApexError(t, `module "libfoo.ffi".*: should support min_sdk_version\(29\)`, `
+		apex {
+			name: "myapex",
+			key: "myapex.key",
+			native_shared_libs: ["libfoo.ffi"],
+			min_sdk_version: "29",
+		}
+
+		apex_key {
+			name: "myapex.key",
+			public_key: "testkey.avbpubkey",
+			private_key: "testkey.pem",
+		}
+
+		rust_ffi_shared {
+			name: "libfoo.ffi",
+			srcs: ["foo.rs"],
+			crate_name: "foo",
+			apex_available: [
+				"myapex",
+			],
+			min_sdk_version: "30",
+		}
+	`)
 }
 
 func TestApexMinSdkVersion_Okay(t *testing.T) {

cc/testing.go

@@ -334,7 +334,7 @@ func GatherRequiredDepsForTest(oses ...android.OsType) string {
 			},
 			apex_available: [
 				"//apex_available:platform",
-				"myapex"
+				"//apex_available:anyapex",
 			],
 		}
 		cc_library {

rust/rust.go

@@ -67,6 +67,9 @@ type BaseProperties struct {
 
 	SubName string `blueprint:"mutated"`
 
+	// Minimum sdk version that the artifact should support when it runs as part of mainline modules(APEX).
+	Min_sdk_version *string
+
 	PreventInstall bool
 	HideFromMake   bool
 }
@@ -1076,7 +1079,29 @@ func (mod *Module) HostToolPath() android.OptionalPath {
 
 var _ android.ApexModule = (*Module)(nil)
 
+func (mod *Module) minSdkVersion() string {
+	return String(mod.Properties.Min_sdk_version)
+}
+
 func (mod *Module) ShouldSupportSdkVersion(ctx android.BaseModuleContext, sdkVersion android.ApiLevel) error {
+	minSdkVersion := mod.minSdkVersion()
+	if minSdkVersion == "apex_inherit" {
+		return nil
+	}
+	if minSdkVersion == "" {
+		return fmt.Errorf("min_sdk_version is not specificed")
+	}
+
+	// Not using nativeApiLevelFromUser because the context here is not
+	// necessarily a native context.
+	ver, err := android.ApiLevelFromUser(ctx, minSdkVersion)
+	if err != nil {
+		return err
+	}
+
+	if ver.GreaterThan(sdkVersion) {
+		return fmt.Errorf("newer SDK(%v)", ver)
+	}
 	return nil
 }
 

rust/testing.go

@@ -78,6 +78,7 @@ func GatherRequiredDepsForTest() string {
 			nocrt: true,
 			system_shared_libs: [],
 			apex_available: ["//apex_available:platform", "//apex_available:anyapex"],
+			min_sdk_version: "29",
 		}
 		cc_library {
 			name: "libprotobuf-cpp-full",
@@ -95,6 +96,7 @@ func GatherRequiredDepsForTest() string {
                         native_coverage: false,
 			sysroot: true,
 			apex_available: ["//apex_available:platform", "//apex_available:anyapex"],
+			min_sdk_version: "29",
 		}
 		rust_library {
 			name: "libtest",
@@ -105,6 +107,7 @@ func GatherRequiredDepsForTest() string {
                         native_coverage: false,
 			sysroot: true,
 			apex_available: ["//apex_available:platform", "//apex_available:anyapex"],
+			min_sdk_version: "29",
 		}
 		rust_library {
 			name: "libprotobuf",