Adding @SuppressWarnings for the latest stable SDK Q drop

Global Presubmit : https://test.corp.google.com/ui#id=OCL:235456897:BASE:235767406:1551211793273:aa1704f6

LSC doc: go/android-sdk-lsc

PiperOrigin-RevId: 235812819

library/core/src/main/java/com/google/android/exoplayer2/drm/FrameworkMediaDrm.java

@@ -75,6 +75,8 @@ public final class FrameworkMediaDrm implements ExoMediaDrm<FrameworkMediaCrypto
     }
   }
 
+  // FIXME: incompatible types in argument.
+  @SuppressWarnings("nullness:argument.type.incompatible")
   @Override
   public void setOnEventListener(
       final ExoMediaDrm.OnEventListener<? super FrameworkMediaCrypto> listener) {
@@ -146,6 +148,8 @@ public final class FrameworkMediaDrm implements ExoMediaDrm<FrameworkMediaCrypto
     return new KeyRequest(requestData, licenseServerUrl);
   }
 
+  // FIXME: incompatible types in return.
+  @SuppressWarnings("nullness:return.type.incompatible")
   @Override
   public byte[] provideKeyResponse(byte[] scope, byte[] response)
       throws NotProvisionedException, DeniedByServerException {

library/core/src/main/java/com/google/android/exoplayer2/scheduler/PlatformScheduler.java

@@ -153,6 +153,8 @@ public final class PlatformScheduler implements Scheduler {
         logd("Requirements are met");
         String serviceAction = extras.getString(KEY_SERVICE_ACTION);
         String servicePackage = extras.getString(KEY_SERVICE_PACKAGE);
+        // FIXME: incompatible types in argument.
+        @SuppressWarnings("nullness:argument.type.incompatible")
         Intent intent = new Intent(serviceAction).setPackage(servicePackage);
         logd("Starting service action: " + serviceAction + " package: " + servicePackage);
         Util.startForegroundService(this, intent);