Do not require the hiddenapi-test-flags argument

Bug: 197127958
Test: atest CtsHiddenApiBlocklistTestApiTestCases CtsHiddenApiBlocklistDebugClassTestCases
Merged-In: I47c454844af8b4797a518a810b17cd4fae49b03b
Change-Id: I47c454844af8b4797a518a810b17cd4fae49b03b
(cherry picked from commit 5f0aa9517ad29dac17a651c728196301fca77664)
diff --git a/tests/signature/api-check/hidden-api-blocklist-test-api/src/android/signature/cts/api/test/HiddenApiTest.java b/tests/signature/api-check/hidden-api-blocklist-test-api/src/android/signature/cts/api/test/HiddenApiTest.java
index 7cefb5c..ffe85fc 100644
--- a/tests/signature/api-check/hidden-api-blocklist-test-api/src/android/signature/cts/api/test/HiddenApiTest.java
+++ b/tests/signature/api-check/hidden-api-blocklist-test-api/src/android/signature/cts/api/test/HiddenApiTest.java
@@ -16,28 +16,14 @@
 
 package android.signature.cts.api.test;
 
-import android.os.Bundle;
-import android.signature.cts.DexApiDocumentParser;
-import android.signature.cts.DexField;
 import android.signature.cts.DexMember;
-import android.signature.cts.DexMemberChecker;
-import android.signature.cts.DexMethod;
-import android.signature.cts.FailureType;
-import android.signature.cts.VirtualPath;
-
-import java.io.IOException;
-import java.nio.ByteBuffer;
-import java.nio.channels.FileChannel;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.StandardOpenOption;
-import java.util.EnumSet;
 import java.util.Set;
-import java.util.function.Predicate;
-import java.util.stream.Stream;
 
 public class HiddenApiTest extends android.signature.cts.api.HiddenApiTest {
 
+    /**
+     * Override to match only those members that specify both test-api and blocked.
+     */
     @Override
     protected boolean shouldTestMember(DexMember member) {
         Set<String> flags = member.getHiddenapiFlags();
diff --git a/tests/signature/api-check/src/java/android/signature/cts/api/HiddenApiTest.java b/tests/signature/api-check/src/java/android/signature/cts/api/HiddenApiTest.java
index 6928e38..3b6fec9 100644
--- a/tests/signature/api-check/src/java/android/signature/cts/api/HiddenApiTest.java
+++ b/tests/signature/api-check/src/java/android/signature/cts/api/HiddenApiTest.java
@@ -45,7 +45,7 @@
     @Override
     protected void initializeFromArgs(Bundle instrumentationArgs) {
         hiddenapiFiles = getCommaSeparatedListRequired(instrumentationArgs, "hiddenapi-files");
-        hiddenapiTestFlags = getCommaSeparatedListRequired(instrumentationArgs, "hiddenapi-test-flags");
+        hiddenapiTestFlags = getCommaSeparatedListOptional(instrumentationArgs, "hiddenapi-test-flags");
         hiddenapiFilterFile = instrumentationArgs.getString("hiddenapi-filter-file");
         hiddenapiFilterSet = new HashSet<>();
     }
@@ -165,7 +165,15 @@
         });
     }
 
+    /**
+     * Determines whether to test the member.
+     *
+     * @param member the member
+     * @return true if the member should be tested, false otherwise.
+     */
     protected boolean shouldTestMember(DexMember member) {
+        // Test the member if it supports ANY of the flags specified in the hiddenapi-test-flags
+        // argument.
         Set<String> flags = member.getHiddenapiFlags();
         for (String testFlag : hiddenapiTestFlags) {
             if (flags.contains(testFlag)) {