Imported JobManager as a source dependency.

We have to make some changes, and it's gotten to the point where
maintaining it as a separate library is more hassle than it's worth,
especially with Google releasing WorkManager as the preferred job
scheduling library.

src/org/thoughtcrime/securesms/jobmanager/dependencies/AggregateDependencyInjector.java

@@ -0,0 +1,36 @@
+package org.thoughtcrime.securesms.jobmanager.dependencies;
+
+import android.content.Context;
+
+import org.thoughtcrime.securesms.jobmanager.Job;
+import org.thoughtcrime.securesms.jobmanager.requirements.Requirement;
+
+public class AggregateDependencyInjector {
+
+  private final DependencyInjector dependencyInjector;
+
+  public AggregateDependencyInjector(DependencyInjector dependencyInjector) {
+    this.dependencyInjector = dependencyInjector;
+  }
+
+  public void injectDependencies(Context context, Job job) {
+    if (job instanceof ContextDependent) {
+      ((ContextDependent)job).setContext(context);
+    }
+
+    for (Requirement requirement : job.getRequirements()) {
+      if (requirement instanceof ContextDependent) {
+        ((ContextDependent)requirement).setContext(context);
+      }
+    }
+
+    if (dependencyInjector != null) {
+      dependencyInjector.injectDependencies(job);
+
+      for (Requirement requirement : job.getRequirements()) {
+        dependencyInjector.injectDependencies(requirement);
+      }
+    }
+  }
+
+}

src/org/thoughtcrime/securesms/jobmanager/dependencies/ContextDependent.java

@@ -0,0 +1,27 @@
+/**
+* Copyright (C) 2014 Open Whisper Systems
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+package org.thoughtcrime.securesms.jobmanager.dependencies;
+
+import android.content.Context;
+
+/**
+ * Any Job or Requirement that depends on {@link android.content.Context} can implement this
+ * interface to receive a Context after being deserialized.
+ */
+public interface ContextDependent {
+  public void setContext(Context context);
+}

src/org/thoughtcrime/securesms/jobmanager/dependencies/DependencyInjector.java

@@ -0,0 +1,24 @@
+/**
+ * Copyright (C) 2014 Open Whisper Systems
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.thoughtcrime.securesms.jobmanager.dependencies;
+
+/**
+ * Interface responsible for injecting dependencies into Jobs.
+ */
+public interface DependencyInjector {
+  public void injectDependencies(Object object);
+}