Implement StylusListener SystemUI CoreStartable.

StylusListener detects first usage of a stylus, and
updates the STYLUS_EVER_USED Settings flag.

Bug: 251206662
DD: go/stylus-first-usage-options
Test: StylusListenerTest
Change-Id: I165481d1166e31b5b8560da5c695003d105068ef

core/java/android/hardware/input/InputManager.java

@@ -30,6 +30,7 @@ import android.app.ActivityThread;
 import android.compat.annotation.ChangeId;
 import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Context;
+import android.content.pm.PackageManager;
 import android.hardware.BatteryState;
 import android.hardware.SensorManager;
 import android.hardware.lights.Light;
@@ -1893,6 +1894,31 @@ public final class InputManager {
         }
     }
 
+    /**
+     * Whether stylus has ever been used on device (false by default).
+     * @hide
+     */
+    public boolean isStylusEverUsed(@NonNull Context context) {
+        return Settings.Global.getInt(context.getContentResolver(),
+                        Settings.Global.STYLUS_EVER_USED, 0) == 1;
+    }
+
+    /**
+     * Set whether stylus has ever been used on device.
+     * Should only ever be set to true once after stylus first usage.
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.WRITE_SECURE_SETTINGS)
+    public void setStylusEverUsed(@NonNull Context context, boolean stylusEverUsed) {
+        if (context.checkCallingPermission(Manifest.permission.WRITE_SECURE_SETTINGS)
+                != PackageManager.PERMISSION_GRANTED) {
+            throw new SecurityException("You need WRITE_SECURE_SETTINGS permission "
+                + "to set stylus ever used.");
+        }
+        Settings.Global.putInt(context.getContentResolver(),
+                Settings.Global.STYLUS_EVER_USED, stylusEverUsed ? 1 : 0);
+    }
+
     /**
      * A callback used to be notified about battery state changes for an input device. The
      * {@link #onBatteryStateChanged(int, long, BatteryState)} method will be called once after the

core/java/android/provider/Settings.java

@@ -15787,6 +15787,15 @@ public final class Settings {
         @SuppressLint("NoSettingsProvider")
         public static final String STYLUS_HANDWRITING_ENABLED = "stylus_handwriting_enabled";
 
+        /**
+         * Indicates whether a stylus has ever been used on the device.
+         *
+         * @hide
+         */
+        @Readable
+        @SuppressLint("NoSettingsProvider")
+        public static final String STYLUS_EVER_USED = "stylus_ever_used";
+
         /**
          * Exemptions to the hidden API blacklist.
          *

packages/SettingsProvider/src/android/provider/settings/validators/GlobalSettingsValidators.java

@@ -175,6 +175,7 @@ public class GlobalSettingsValidators {
         VALIDATORS.put(Global.ADVANCED_BATTERY_USAGE_AMOUNT, PERCENTAGE_INTEGER_VALIDATOR);
         VALIDATORS.put(Global.ADAPTIVE_BATTERY_MANAGEMENT_ENABLED, BOOLEAN_VALIDATOR);
         VALIDATORS.put(Global.POWER_BUTTON_LONG_PRESS_DURATION_MS, NONE_NEGATIVE_LONG_VALIDATOR);
+        VALIDATORS.put(Global.STYLUS_EVER_USED, BOOLEAN_VALIDATOR);
 
         VALIDATORS.put(Global.Wearable.HAS_PAY_TOKENS, BOOLEAN_VALIDATOR);
         VALIDATORS.put(Global.Wearable.GMS_CHECKIN_TIMEOUT_MIN, ANY_INTEGER_VALIDATOR);

packages/SettingsProvider/test/src/android/provider/SettingsBackupTest.java

@@ -276,6 +276,7 @@ public class SettingsBackupTest {
                     Settings.Global.SMART_REPLIES_IN_NOTIFICATIONS_FLAGS,
                     Settings.Global.SMART_SUGGESTIONS_IN_NOTIFICATIONS_FLAGS,
                     Settings.Global.STYLUS_HANDWRITING_ENABLED,
+                    Settings.Global.STYLUS_EVER_USED,
                     Settings.Global.ENABLE_ADB_INCREMENTAL_INSTALL_DEFAULT,
                     Settings.Global.ENABLE_MULTI_SLOT_TIMEOUT_MILLIS,
                     Settings.Global.ENHANCED_4G_MODE_ENABLED,

packages/SystemUI/src/com/android/systemui/dagger/FrameworkServicesModule.java

@@ -55,6 +55,7 @@ import android.hardware.display.ColorDisplayManager;
 import android.hardware.display.DisplayManager;
 import android.hardware.face.FaceManager;
 import android.hardware.fingerprint.FingerprintManager;
+import android.hardware.input.InputManager;
 import android.media.AudioManager;
 import android.media.IAudioService;
 import android.media.MediaRouter2Manager;
@@ -282,6 +283,12 @@ public class FrameworkServicesModule {
         return InteractionJankMonitor.getInstance();
     }
 
+    @Provides
+    @Singleton
+    static InputManager provideInputManager(Context context) {
+        return context.getSystemService(InputManager.class);
+    }
+
     @Provides
     @Singleton
     static InputMethodManager provideInputMethodManager(Context context) {

packages/SystemUI/src/com/android/systemui/flags/Flags.kt

@@ -412,6 +412,9 @@ object Flags {
     @JvmField val UDFPS_ELLIPSE_DEBUG_UI = unreleasedFlag(2201, "udfps_ellipse_debug")
     @JvmField val UDFPS_ELLIPSE_DETECTION = unreleasedFlag(2202, "udfps_ellipse_detection")
 
+    // 2300 - stylus
+    @JvmField val TRACK_STYLUS_EVER_USED = unreleasedFlag(2300, "track_stylus_ever_used")
+
     // TODO(b259590361): Tracking bug
     val EXPERIMENTAL_FLAG = unreleasedFlag(2, "exp_flag_release")
 }