Tag apex_set's 'set' config with android:"path"

This allows apex_set's set config to use other soong modules as a dependency

Bug:249169376
Change-Id: I8da20c6f474328d63d9aa3811f94e3e04b89ea4c
Test: Added a test case to check soong module assignment to the set field of an apks_set rule

apex/apex_test.go

@@ -7276,6 +7276,28 @@ func TestAppSetBundlePrebuilt(t *testing.T) {
 	android.AssertStringEquals(t, "myapex input", extractorOutput, copiedApex.Input.String())
 }
 
+func TestApexSetApksModuleAssignment(t *testing.T) {
+	ctx := testApex(t, `
+		apex_set {
+			name: "myapex",
+			set: ":myapex_apks_file",
+		}
+
+		filegroup {
+			name: "myapex_apks_file",
+			srcs: ["myapex.apks"],
+		}
+	`)
+
+	m := ctx.ModuleForTests("myapex.apex.extractor", "android_common")
+
+	// Check that the extractor produces the correct apks file from the input module
+	extractorOutput := "out/soong/.intermediates/myapex.apex.extractor/android_common/extracted/myapex.apks"
+	extractedApex := m.Output(extractorOutput)
+
+	android.AssertArrayString(t, "extractor input", []string{"myapex.apks"}, extractedApex.Inputs.Strings())
+}
+
 func testNoUpdatableJarsInBootImage(t *testing.T, errmsg string, preparer android.FixturePreparer, fragments ...java.ApexVariantReference) {
 	t.Helper()
 

apex/prebuilt.go

@@ -840,17 +840,17 @@ type ApexSet struct {
 
 type ApexExtractorProperties struct {
 	// the .apks file path that contains prebuilt apex files to be extracted.
-	Set *string
+	Set *string `android:"path"`
 
 	Sanitized struct {
 		None struct {
-			Set *string
+			Set *string `android:"path"`
 		}
 		Address struct {
-			Set *string
+			Set *string `android:"path"`
 		}
 		Hwaddress struct {
-			Set *string
+			Set *string `android:"path"`
 		}
 	}