Do not follow SDK member dependencies for APEX payloads.

Test: m nothing
Test: `m` with prebuilts/runtime in the manifest (along with other
  fixes)
Bug: 151303681
Change-Id: I450d476975c7ab4434228b8c4baf3af192142211

sdk/cc_sdk_test.go

@@ -79,6 +79,8 @@ func TestBasicSdkWithCc(t *testing.T) {
 		cc_library_shared {
 			name: "sdkmember",
 			system_shared_libs: [],
+			stl: "none",
+			apex_available: ["mysdkapex"],
 		}
 
 		sdk_snapshot {
@@ -152,6 +154,13 @@ func TestBasicSdkWithCc(t *testing.T) {
 			key: "myapex.key",
 			certificate: ":myapex.cert",
 		}
+
+		apex {
+			name: "mysdkapex",
+			native_shared_libs: ["sdkmember"],
+			key: "myapex.key",
+			certificate: ":myapex.cert",
+		}
 	`)
 
 	sdkMemberV1 := result.ModuleForTests("sdkmember_mysdk_1", "android_arm64_armv8-a_shared_myapex").Rule("toc").Output

sdk/sdk.go

@@ -330,6 +330,11 @@ type dependencyTag struct {
 	blueprint.BaseDependencyTag
 }
 
+// Mark this tag so dependencies that use it are excluded from APEX contents.
+func (t dependencyTag) ExcludeFromApexContents() {}
+
+var _ android.ExcludeFromApexContentsTag = dependencyTag{}
+
 // For dependencies from an in-development version of an SDK member to frozen versions of the same member
 // e.g. libfoo -> libfoo.mysdk.11 and libfoo.mysdk.12
 type sdkMemberVersionedDepTag struct {

sdk/testing.go

@@ -48,6 +48,7 @@ func testSdkContext(bp string, fs map[string][]byte) (*android.TestContext, andr
 		"apex_manifest.json":                           nil,
 		"system/sepolicy/apex/myapex-file_contexts":    nil,
 		"system/sepolicy/apex/myapex2-file_contexts":   nil,
+		"system/sepolicy/apex/mysdkapex-file_contexts": nil,
 		"myapex.avbpubkey":                             nil,
 		"myapex.pem":                                   nil,
 		"myapex.x509.pem":                              nil,