Remove setActiveUser together with frameworks/base (see 12/n)

setActiveUser is removed from the @hide API surface and is no longer
necessary. The framework ensures that the correct user is set without
an explicit call, since userId is sent as a parameter to each of the
methods already.

Bug: 157790417
Test: See testing from frameworks/base change (12/n) from the same
      gerrit topic
Change-Id: Id88b818ed0bb1f75f18ac8e9ba7aff2a9b80b319

src/com/android/settings/biometrics/face/FaceEnrollSidecar.java

@@ -48,10 +48,6 @@ public class FaceEnrollSidecar extends BiometricEnrollSidecar {
     @Override
     public void startEnrollment() {
         super.startEnrollment();
-        if (mUserId != UserHandle.USER_NULL) {
-            mFaceManager.setActiveUser(mUserId);
-        }
-
         mFaceManager.enroll(mUserId, mToken, mEnrollmentCancel,
                 mEnrollmentCallback, mDisabledFeatures);
     }

src/com/android/settings/biometrics/face/FaceSettings.java

@@ -224,7 +224,6 @@ public class FaceSettings extends DashboardFragment {
         if (requestCode == CONFIRM_REQUEST) {
             mConfirmingPassword = false;
             if (resultCode == RESULT_FINISHED || resultCode == RESULT_OK) {
-                mFaceManager.setActiveUser(mUserId);
                 // The pin/pattern/password was set.
                 if (data != null) {
                     mToken = data.getByteArrayExtra(

src/com/android/settings/biometrics/fingerprint/FingerprintEnrollSidecar.java

@@ -40,9 +40,6 @@ public class FingerprintEnrollSidecar extends BiometricEnrollSidecar {
     @Override
     protected void startEnrollment() {
         super.startEnrollment();
-        if (mUserId != UserHandle.USER_NULL) {
-            mFingerprintManager.setActiveUser(mUserId);
-        }
         mFingerprintManager.enroll(mToken, mEnrollmentCancel,
                 0 /* flags */, mUserId, mEnrollmentCallback);
     }

src/com/android/settings/biometrics/fingerprint/FingerprintRemoveSidecar.java

@@ -79,9 +79,6 @@ public class FingerprintRemoveSidecar extends InstrumentedFragment {
             Log.e(TAG, "Remove already in progress");
             return;
         }
-        if (userId != UserHandle.USER_NULL) {
-            mFingerprintManager.setActiveUser(userId);
-        }
         mFingerprintRemoving = fingerprint;
         mFingerprintManager.remove(fingerprint, userId, mRemoveCallback);;
     }

src/com/android/settings/password/ConfirmDeviceCredentialActivity.java

@@ -351,8 +351,6 @@ public class ConfirmDeviceCredentialActivity extends FragmentActivity {
     }
 
     private void showBiometricPrompt(PromptInfo promptInfo) {
-        mBiometricManager.setActiveUser(mUserId);
-
         mBiometricFragment = (BiometricFragment) getSupportFragmentManager()
                 .findFragmentByTag(TAG_BIOMETRIC_FRAGMENT);
         boolean newFragment = false;