add instruction loader null checks to prevent potential npes

Author: Guardiola31337

libandroid-navigation-ui/src/main/java/com/mapbox/services/android/navigation/ui/v5/instruction/InstructionView.java

@@ -750,15 +750,22 @@ private void updateDataFromInstruction(InstructionModel model) {
   private void updateDataFromBannerInstruction(InstructionModel model) {
     updateManeuverView(model);
     if (model.getPrimaryBannerText() != null) {
-      createInstructionLoader(upcomingPrimaryText, model.getPrimaryBannerText()).loadInstruction();
+      InstructionLoader instructionLoader = createInstructionLoader(upcomingPrimaryText, model.getPrimaryBannerText());
+      if (instructionLoader != null) {
+        instructionLoader.loadInstruction();
+      }
     }
     if (model.getSecondaryBannerText() != null) {
       if (upcomingSecondaryText.getVisibility() == GONE) {
         upcomingSecondaryText.setVisibility(VISIBLE);
         upcomingPrimaryText.setMaxLines(1);
         adjustBannerTextVerticalBias(0.65f);
       }
-      createInstructionLoader(upcomingSecondaryText, model.getSecondaryBannerText()).loadInstruction();
+      InstructionLoader instructionLoader = createInstructionLoader(upcomingSecondaryText,
+        model.getSecondaryBannerText());
+      if (instructionLoader != null) {
+        instructionLoader.loadInstruction();
+      }
     } else {
       upcomingPrimaryText.setMaxLines(2);
       upcomingSecondaryText.setVisibility(GONE);

libandroid-navigation/src/main/java/com/mapbox/services/android/navigation/v5/navigation/RouteProcessorRunnable.java

@@ -59,7 +59,8 @@ private void process() {
     NavigationEngineFactory engineFactory = navigation.retrieveEngineFactory();
     final boolean userOffRoute = isUserOffRoute(options, status, rawLocation, routeProgress, engineFactory);
     final Location snappedLocation = findSnappedLocation(status, rawLocation, routeProgress, engineFactory);
-    final boolean checkFasterRoute = checkFasterRoute(options, snappedLocation, routeProgress, engineFactory, userOffRoute);
+    final boolean checkFasterRoute = checkFasterRoute(options, snappedLocation, routeProgress, engineFactory,
+      userOffRoute);
     final List<Milestone> milestones = findTriggeredMilestones(navigation, routeProgress);
 
     sendUpdateToResponseHandler(userOffRoute, milestones, snappedLocation, checkFasterRoute, routeProgress);