[Android] BackgroundTaskScheduler reschedule implementation

components/background_task_scheduler/android/junit/src/org/chromium/components/background_task_scheduler/TestBackgroundTask.java

Index: components/background_task_scheduler/android/junit/src/org/chromium/components/background_task_scheduler/TestBackgroundTask.java
diff --git a/components/background_task_scheduler/android/junit/src/org/chromium/components/background_task_scheduler/TestBackgroundTask.java b/components/background_task_scheduler/android/junit/src/org/chromium/components/background_task_scheduler/TestBackgroundTask.java
index aed8b89fed9f36ac1b9be5512be5b10d21de06aa..00b72b3be1e64c6fc1a54ba1d3c0f4c6cea30692 100644
--- a/components/background_task_scheduler/android/junit/src/org/chromium/components/background_task_scheduler/TestBackgroundTask.java
+++ b/components/background_task_scheduler/android/junit/src/org/chromium/components/background_task_scheduler/TestBackgroundTask.java
@@ -8,6 +8,8 @@ import android.content.Context;
 
 /** Dummy implementation of a background task used for testing. */
 class TestBackgroundTask implements BackgroundTask {
+    private static int sRescheduleCalls = 0;
+
     public TestBackgroundTask() {}
 
     @Override
@@ -20,4 +22,17 @@ class TestBackgroundTask implements BackgroundTask {
     public boolean onStopTask(Context context, TaskParameters taskParameters) {
         return false;
     }
+
+    @Override
+    public void reschedule(Context context) {
+        sRescheduleCalls++;
+    }
+
+    public static int getRescheduleCalls() {
+        return sRescheduleCalls;
+    }
+
+    public static void reset() {
+        sRescheduleCalls = 0;
+    }
 }