Remove @SystemApi from some constants for R.

These were exposed for telephony mainline. Will be revisited in S.

Test: basic sanity
Bug: 148171847
Bug: 148171388
Change-Id: Ibdcac557cf35e723f09a7b7a2e59c7deae1fc94e

api/system-current.txt

@@ -2281,7 +2281,6 @@ package android.content.pm {
     field @Deprecated public static final int MASK_PERMISSION_FLAGS = 255; // 0xff
     field public static final int MATCH_ANY_USER = 4194304; // 0x400000
     field public static final int MATCH_FACTORY_ONLY = 2097152; // 0x200000
-    field public static final int MATCH_HIDDEN_UNTIL_INSTALLED_COMPONENTS = 536870912; // 0x20000000
     field public static final int MATCH_INSTANT = 8388608; // 0x800000
     field public static final int MODULE_APEX_NAME = 1; // 0x1
     field public static final int RESTRICTION_HIDE_FROM_SUGGESTIONS = 1; // 0x1
@@ -9377,7 +9376,6 @@ package android.provider {
     field public static final String AUTOFILL_USER_DATA_MAX_VALUE_LENGTH = "autofill_user_data_max_value_length";
     field public static final String AUTOFILL_USER_DATA_MIN_VALUE_LENGTH = "autofill_user_data_min_value_length";
     field public static final String AUTO_REVOKE_DISABLED = "auto_revoke_disabled";
-    field public static final String CARRIER_APPS_HANDLED = "carrier_apps_handled";
     field public static final String COMPLETED_CATEGORY_PREFIX = "suggested.completed_category.";
     field public static final String DOZE_ALWAYS_ON = "doze_always_on";
     field public static final String HUSH_GESTURE_USED = "hush_gesture_used";

core/java/android/content/pm/PackageManager.java

@@ -557,7 +557,6 @@ public abstract class PackageManager {
      * Internal {@link PackageInfo} flag used to indicate that a package is a hidden system app.
      * @hide
      */
-    @SystemApi
     public static final int MATCH_HIDDEN_UNTIL_INSTALLED_COMPONENTS =  0x20000000;
 
     /**

core/java/android/provider/Settings.java

@@ -8503,7 +8503,6 @@ public final class Settings {
          *
          * @hide
          */
-        @SystemApi
         public static final String CARRIER_APPS_HANDLED = "carrier_apps_handled";
 
         /**