Android config updates for one handed bouncer.

This is the changes in Settings (to store the current screen side) for
the one-handed keyguard. This also checks in symbols.xml to expose the
platform config to SysUI (the lines in symbols.xml are currently in
config.xml; I'm assuming that a previous revert didn't remove them).

Bug: 170858298
Test: included.
Change-Id: I9d91a9360c821562634e83295f5e2e340f6de1d5

core/java/android/provider/Settings.java

@@ -14622,6 +14622,29 @@ public final class Settings {
         public static final String POWER_BUTTON_VERY_LONG_PRESS =
                 "power_button_very_long_press";
 
+
+        /**
+         * Keyguard should be on the left hand side of the screen, for wide screen layouts.
+         *
+         * @hide
+         */
+        public static final int ONE_HANDED_KEYGUARD_SIDE_LEFT = 0;
+
+        /**
+         * Keyguard should be on the right hand side of the screen, for wide screen layouts.
+         *
+         * @hide
+         */
+        public static final int ONE_HANDED_KEYGUARD_SIDE_RIGHT = 1;
+        /**
+         * In one handed mode, which side the keyguard should be on. Allowable values are one of
+         * the ONE_HANDED_KEYGUARD_SIDE_* constants.
+         *
+         * @hide
+         */
+        @Readable
+        public static final String ONE_HANDED_KEYGUARD_SIDE = "one_handed_keyguard_side";
+
         /**
          * Keys we no longer back up under the current schema, but want to continue to
          * process when restoring historical backup datasets.

core/res/res/values/symbols.xml

@@ -4204,4 +4204,6 @@
   <java-symbol type="bool" name="config_telephony5gNonStandalone" />
 
   <java-symbol type="bool" name="config_voice_data_sms_auto_fallback" />
+
+  <java-symbol type="bool" name="config_enableOneHandedKeyguard" />
 </resources>

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

@@ -147,5 +147,10 @@ public class GlobalSettingsValidators {
         VALIDATORS.put(Global.DEVELOPMENT_SETTINGS_ENABLED, BOOLEAN_VALIDATOR);
         VALIDATORS.put(Global.NOTIFICATION_FEEDBACK_ENABLED, BOOLEAN_VALIDATOR);
         VALIDATORS.put(Global.RESTRICTED_NETWORKING_MODE, BOOLEAN_VALIDATOR);
+        VALIDATORS.put(
+                Global.ONE_HANDED_KEYGUARD_SIDE,
+                new InclusiveIntegerRangeValidator(
+                        /* first= */Global.ONE_HANDED_KEYGUARD_SIDE_LEFT,
+                        /* last= */Global.ONE_HANDED_KEYGUARD_SIDE_RIGHT));
     }
 }

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

@@ -283,6 +283,7 @@ public class SettingsBackupTest {
                     Settings.Global.EUICC_REMOVING_INVISIBLE_PROFILES_TIMEOUT_MILLIS,
                     Settings.Global.EUICC_SWITCH_SLOT_TIMEOUT_MILLIS,
                     Settings.Global.FANCY_IME_ANIMATIONS,
+                    Settings.Global.ONE_HANDED_KEYGUARD_SIDE,
                     Settings.Global.FORCE_ALLOW_ON_EXTERNAL,
                     Settings.Global.FORCED_APP_STANDBY_ENABLED,
                     Settings.Global.FORCED_APP_STANDBY_FOR_SMALL_BATTERY_ENABLED,