Give Doclava our manifest; more permission docs.

We've seen some @SystemApi methods protected with non-system
permissions, so give Doclava the platform AndroidManifest.xml so it
can parse the actual permission protection levels to look for APIs
that are letting in non-system apps.

Also document more @SystemApi permissions.

This is purely a docs change; no logic changes are being made.

Test: make -j32 update-api
Bug: 62263906
Change-Id: Ie0f0a5fb0033817bcc95060f2183a52ae4ae7b06

location/java/android/location/LocationManager.java

@@ -828,6 +828,7 @@ public class LocationManager {
      * @hide
      */
     @SystemApi
+    @RequiresPermission(anyOf = {ACCESS_COARSE_LOCATION, ACCESS_FINE_LOCATION})
     public void requestLocationUpdates(LocationRequest request, LocationListener listener,
             Looper looper) {
         checkListener(listener);
@@ -856,6 +857,7 @@ public class LocationManager {
      * @hide
      */
     @SystemApi
+    @RequiresPermission(anyOf = {ACCESS_COARSE_LOCATION, ACCESS_FINE_LOCATION})
     public void requestLocationUpdates(LocationRequest request, PendingIntent intent) {
         checkPendingIntent(intent);
         requestLocationUpdates(request, null, null, intent);