Remove usages of ActionBarActivity.

ActionBarActivity has been deprecated for 2+ years and has been
extending AppCompatActivity for all that time. These changes
should be no-ops.

Bug: 35253513
Test: None
Change-Id: Ic5fdb48f000aea23f6f5ec58a460fd74b6a8690a
(cherry picked from commit 4facd1a92e9da980156a0fa31867591930cde190)
diff --git a/src/com/android/mail/ui/AbstractMailActivity.java b/src/com/android/mail/ui/AbstractMailActivity.java
index 00d2f5f..5cf4128 100644
--- a/src/com/android/mail/ui/AbstractMailActivity.java
+++ b/src/com/android/mail/ui/AbstractMailActivity.java
@@ -20,7 +20,7 @@
 import android.content.Context;
 import android.os.Bundle;
 import android.os.StrictMode;
-import android.support.v7.app.ActionBarActivity;
+import android.support.v7.app.AppCompatActivity;
 
 import java.io.FileDescriptor;
 import java.io.PrintWriter;
@@ -37,7 +37,7 @@
  * <p>In the Gmail codebase, this was called GmailBaseActivity</p>
  *
  */
-public abstract class AbstractMailActivity extends ActionBarActivity implements RestrictedActivity {
+public abstract class AbstractMailActivity extends AppCompatActivity implements RestrictedActivity {
 
     private final UiHandler mUiHandler = new UiHandler();
 
diff --git a/src/com/android/mail/ui/FolderSelectionActivity.java b/src/com/android/mail/ui/FolderSelectionActivity.java
index 53e3539..09dae1a 100644
--- a/src/com/android/mail/ui/FolderSelectionActivity.java
+++ b/src/com/android/mail/ui/FolderSelectionActivity.java
@@ -26,7 +26,7 @@
 import android.database.DataSetObservable;
 import android.database.DataSetObserver;
 import android.os.Bundle;
-import android.support.v7.app.ActionBarActivity;
+import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
@@ -50,7 +50,7 @@
 /**
  * This activity displays the list of available folders for the current account.
  */
-public class FolderSelectionActivity extends ActionBarActivity implements OnClickListener,
+public class FolderSelectionActivity extends AppCompatActivity implements OnClickListener,
         DialogInterface.OnClickListener, ControllableActivity,
         FolderSelector {
     public static final String EXTRA_ACCOUNT_SHORTCUT = "account-shortcut";