Update Companion to version 2.57a

Change-Id: I85ac5189c0749705b1e5c9f0b95e995596d8e492

appinventor/aiplayapp/youngandroidproject/project.properties

@@ -7,14 +7,14 @@ icon=AI2Companion-Icon.png
 # The Version code is an integer. Each new version of an App uploaded
 # to the Play Store must have a version greater then the version in
 # the store
-versioncode=12825700
+versioncode=12825702
 # The Version Name is displayed to the user and can contain numbers
 # and letters. It generally should be congruent to the Version Code
 # Terms used by AI2:
 # Version code XYZ turns into X.YZ. ai2 indicates a Companion for AI2
 # and an optional "zx1" indicates it has internal Zebra Crossing (QR
 # Code) scanning builtin.
-versionname=2.57
+versionname=2.57a
 useslocation=False
 androidminsdk=7
 actionbar=true

appinventor/components/src/com/google/appinventor/components/common/YaVersion.java

@@ -1341,11 +1341,11 @@ public class YaVersion {
 
   public static final String ACCEPTABLE_COMPANION_PACKAGE = "edu.mit.appinventor.aicompanion3";
 
-  public static final String PREFERRED_COMPANION = "2.57";
+  public static final String PREFERRED_COMPANION = "2.57a";
   public static final String COMPANION_UPDATE_URL = "";
   public static final String COMPANION_UPDATE_URL1 = "";
   public static final String COMPANION_UPDATE_EMULATOR_URL = "";
-  public static final String [] ACCEPTABLE_COMPANIONS = { "2.57", "2.57u" };
+  public static final String [] ACCEPTABLE_COMPANIONS = { "2.57a", "2.57au" };
 
   // Splash Screen Values
   public static final int SPLASH_SURVEY = 1;