binder: remove existing warnings and allow failOnWarnings (#10989)

Author: jdcormie

binder/build.gradle

@@ -79,9 +79,12 @@ import net.ltgt.gradle.errorprone.CheckSeverity
 
 tasks.withType(JavaCompile).configureEach {
     options.compilerArgs += [
-            "-Xlint:-cast"
+            "-Xlint:-cast",
+            // For junit-1.15-api & org.robolectric/shadows-framework/4.11.1
+            "-Xlint:-classfile",
+            // Unclaimed annotations. TODO(jdcormie): Fix?
+            "-Xlint:-processing",
     ]
-    options.compilerArgs -= ["-Werror"] // https://github.com/grpc/grpc-java/issues/10297
     appendToProperty(it.options.errorprone.excludedPaths, ".*/R.java", "|")
 }
 

binder/src/main/java/io/grpc/binder/internal/MetadataHelper.java

@@ -148,6 +148,9 @@ public static Metadata readMetadata(Parcel parcel, Attributes attributes) throws
         }
         int parcelableStartPos = parcel.dataPosition();
         try {
+          // readParcelable(Classloader, Class<>) requires SDK 33 and at this layer we can't know
+          // value's type anyway.
+          @SuppressWarnings("deprecation")
           Parcelable value = parcel.readParcelable(MetadataHelper.class.getClassLoader());
           if (value == null) {
             throw Status.INTERNAL.withDescription("Read null parcelable in metadata").asException();

binder/src/main/java/io/grpc/binder/internal/ParcelableInputStream.java

@@ -79,6 +79,8 @@ final class ParcelableInputStream<P extends Parcelable> extends InputStream {
   @SuppressWarnings("unchecked")
   static <P extends Parcelable> ParcelableInputStream<P> readFromParcel(
       Parcel parcel, ClassLoader classLoader) {
+    // readParcelable(Classloader, Class<P>) requires SDK 33 and this class isn't typesafe anyway.
+    @SuppressWarnings("deprecation")
     P value = (P) parcel.readParcelable(classLoader);
     return new ParcelableInputStream<>(null, value, true);
   }

binder/src/test/java/io/grpc/binder/SecurityPoliciesTest.java

@@ -490,6 +490,7 @@ public PackageInfoBuilder setSignatures(Signature... signatures) {
       return this;
     }
 
+    @SuppressWarnings("deprecation")  // 'signatures': We don't yet support signing cert rotation.
     public PackageInfo build() {
       checkState(this.packageName != null, "packageName is a mandatory field");
 

binder/src/test/java/io/grpc/binder/ServerSecurityPolicyTest.java

@@ -62,6 +62,7 @@ public void testDefaultInternalOnly() throws Exception {
   }
 
   @Test
+  @Deprecated
   public void testDefaultInternalOnly_legacyApi() {
     policy = new ServerSecurityPolicy();
     assertThat(policy.checkAuthorizationForService(MY_UID, SERVICE1).getCode())
@@ -80,6 +81,7 @@ public void testInternalOnly_AnotherUid() throws Exception {
   }
 
   @Test
+  @Deprecated
   public void testInternalOnly_AnotherUid_legacyApi() {
     policy = new ServerSecurityPolicy();
     assertThat(policy.checkAuthorizationForService(OTHER_UID, SERVICE1).getCode())
@@ -98,6 +100,7 @@ public void testBuilderDefault() throws Exception {
   }
 
   @Test
+  @Deprecated
   public void testBuilderDefault_legacyApi() {
     policy = ServerSecurityPolicy.newBuilder().build();
     assertThat(policy.checkAuthorizationForService(MY_UID, SERVICE1).getCode())
@@ -125,6 +128,7 @@ public void testPerService() throws Exception {
 
 
   @Test
+  @Deprecated
   public void testPerService_legacyApi() {
     policy =
         ServerSecurityPolicy.newBuilder()
@@ -251,6 +255,7 @@ SERVICE2, policy((uid) -> uid == OTHER_UID ? Status.OK : Status.PERMISSION_DENIE
         .isEqualTo(Status.PERMISSION_DENIED.getCode());
   }
   @Test
+  @Deprecated
   public void testPerServiceNoDefault_legacyApi() {
     policy =
         ServerSecurityPolicy.newBuilder()

binder/src/test/java/io/grpc/binder/internal/ParcelableInputStreamTest.java

@@ -88,8 +88,9 @@ public void testWriteToParcel() throws Exception {
     stream.writeToParcel(parcel);
 
     parcel.setDataPosition(0);
-    assertThat((TestParcelable) parcel.readParcelable(getClass().getClassLoader()))
-        .isEqualTo(testParcelable);
+    @SuppressWarnings("deprecation") // readParcelable(ClassLoader)'s replacement is only in 33+.
+    TestParcelable clone = parcel.readParcelable(getClass().getClassLoader());
+    assertThat(clone).isEqualTo(testParcelable);
   }
 
   @Test
@@ -113,8 +114,9 @@ public void testAsRegularInputStream() throws Exception {
     parcel.unmarshall(data, 0, data.length);
     parcel.setDataPosition(0);
 
-    assertThat((TestParcelable) parcel.readParcelable(getClass().getClassLoader()))
-        .isEqualTo(testParcelable);
+    @SuppressWarnings("deprecation") // readParcelable(ClassLoader)'s replacement is only in 33+.
+    TestParcelable clone = parcel.readParcelable(getClass().getClassLoader());
+    assertThat(clone).isEqualTo(testParcelable);
   }
 
   @Test