Add QuickAccessWallet API

Adds a new API that allows applications to provide payment cards and
other relevant passes to SysUI which are then shown in the Quick Access
Wallet (long press on Pixel). See go/aospqaw-dd for details.

Bug: 144342153
Test: manual - started device, didn't blow up
Test: atest - run from frameworks/base dir
Change-Id: I8fef3116e6e4bd1f8a4f5a907892ea8993b49b0e

core/java/android/provider/Settings.java

@@ -1968,6 +1968,21 @@ public final class Settings {
     public static final String ACTION_REQUEST_SET_AUTOFILL_SERVICE =
             "android.settings.REQUEST_SET_AUTOFILL_SERVICE";
 
+    /**
+     * Activity Action: Show screen for controlling the Quick Access Wallet.
+     * <p>
+     * In some cases, a matching Activity may not exist, so ensure you
+     * safeguard against this.
+     * <p>
+     * Input: The Intent's data URI specifies the application package name
+     * to be shown, with the "package" scheme.  That is "package:com.my.app".
+     * <p>
+     * Output: Nothing.
+     */
+    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
+    public static final String ACTION_QUICK_ACCESS_WALLET_SETTINGS =
+            "android.settings.QUICK_ACCESS_WALLET_SETTINGS";
+
     /**
      * Activity Action: Show screen for controlling which apps have access on volume directories.
      * <p>