diff --git a/api/system-current.txt b/api/system-current.txt
index 148ea70f87d04..2420dfb7ec014 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -3164,12 +3164,17 @@ package android.os {
   public class HidlSupport {
     method public static boolean deepEquals(java.lang.Object, java.lang.Object);
     method public static int deepHashCode(java.lang.Object);
+    method public static int getPidIfSharable();
     method public static boolean interfacesEqual(android.os.IHwInterface, java.lang.Object);
   }
 
   public abstract class HwBinder implements android.os.IHwBinder {
     method public static final void configureRpcThreadpool(long, boolean);
+    method public static void enableInstrumentation();
+    method public static final android.os.IHwBinder getService(java.lang.String, java.lang.String) throws java.util.NoSuchElementException, android.os.RemoteException;
+    method public static final android.os.IHwBinder getService(java.lang.String, java.lang.String, boolean) throws java.util.NoSuchElementException, android.os.RemoteException;
     method public static final void joinRpcThreadpool();
+    method public final void transact(int, android.os.HwParcel, android.os.HwParcel, int) throws android.os.RemoteException;
   }
 
   public class HwBlob {
@@ -3269,6 +3274,8 @@ package android.os {
 
   public abstract interface IHwBinder {
     method public abstract boolean linkToDeath(android.os.IHwBinder.DeathRecipient, long);
+    method public abstract android.os.IHwInterface queryLocalInterface(java.lang.String);
+    method public abstract void transact(int, android.os.HwParcel, android.os.HwParcel, int) throws android.os.RemoteException;
     method public abstract boolean unlinkToDeath(android.os.IHwBinder.DeathRecipient);
   }
 
diff --git a/core/java/android/os/HidlSupport.java b/core/java/android/os/HidlSupport.java
index 335bf9d86fc74..91b796aba6550 100644
--- a/core/java/android/os/HidlSupport.java
+++ b/core/java/android/os/HidlSupport.java
@@ -212,9 +212,10 @@ public class HidlSupport {
     }
 
     /**
-     * Return PID of process if sharable to clients.
+     * Return PID of process only if on a non-user build. For debugging purposes.
      * @hide
      */
+    @SystemApi
     public static native int getPidIfSharable();
 
     /** @hide */
diff --git a/core/java/android/os/HwBinder.java b/core/java/android/os/HwBinder.java
index 389a79b5cbe64..2a088a659b0fb 100644
--- a/core/java/android/os/HwBinder.java
+++ b/core/java/android/os/HwBinder.java
@@ -53,14 +53,30 @@ public abstract class HwBinder implements IHwBinder {
     public native final void registerService(String serviceName)
         throws RemoteException;
 
-    /** @hide */
+    /**
+     * Returns the specified service from the hwservicemanager. Does not retry.
+     *
+     * @param iface fully-qualified interface name for example foo.bar@1.3::IBaz
+     * @param serviceName the instance name of the service for example default.
+     * @throws NoSuchElementException when the service is unavailable
+     * @hide
+     */
+    @SystemApi
     public static final IHwBinder getService(
             String iface,
             String serviceName)
         throws RemoteException, NoSuchElementException {
         return getService(iface, serviceName, false /* retry */);
     }
-    /** @hide */
+    /**
+     * Returns the specified service from the hwservicemanager.
+     * @param iface fully-qualified interface name for example foo.bar@1.3::IBaz
+     * @param serviceName the instance name of the service for example default.
+     * @param retry whether to wait for the service to start if it's not already started
+     * @throws NoSuchElementException when the service is unavailable
+     * @hide
+     */
+    @SystemApi
     public static native final IHwBinder getService(
             String iface,
             String serviceName,
@@ -111,6 +127,7 @@ public abstract class HwBinder implements IHwBinder {
      * Enable instrumentation if available.
      * @hide
      */
+    @SystemApi
     public static void enableInstrumentation() {
         native_report_sysprop_change();
     }
diff --git a/core/java/android/os/IHwBinder.java b/core/java/android/os/IHwBinder.java
index ce9f6c1654c26..0c592e1f04b8a 100644
--- a/core/java/android/os/IHwBinder.java
+++ b/core/java/android/os/IHwBinder.java
@@ -27,12 +27,22 @@ public interface IHwBinder {
     /** @hide */
     public static final int FLAG_ONEWAY = 1;
 
-    /** @hide */
+    /**
+     * Process a hwbinder transaction.
+     *
+     * @hide
+     */
+    @SystemApi
     public void transact(
             int code, HwParcel request, HwParcel reply, int flags)
         throws RemoteException;
 
-    /** @hide */
+    /**
+     * Return as IHwInterface instance only if this implements descriptor.
+     * @param descriptor for example foo.bar@1.0::IBaz
+     * @hide
+     */
+    @SystemApi
     public IHwInterface queryLocalInterface(String descriptor);
 
     /**