DO NOT MERGE Filter out the overdue location cases in GPS test

Bug 7109051

This was merged into jb-mr1 already.

Occasionally, passive listeners receive a overdue location.
The overdue location comes from previous test round, and it will
confuse calculation of time interval. Finally, the confused interval
is mistaken for a FAIL even though GPS works normally. For this reason,
we have to filter out the overdue location at beginning of test round.
We log that the overdue location was ignored.

Change-Id: Ia05c973cb0010e1df1bf2c07a85fdae722ec5c94
diff --git a/apps/CtsVerifier/src/com/android/cts/verifier/location/LocationVerifier.java b/apps/CtsVerifier/src/com/android/cts/verifier/location/LocationVerifier.java
index fd226a6..6226cf6 100644
--- a/apps/CtsVerifier/src/com/android/cts/verifier/location/LocationVerifier.java
+++ b/apps/CtsVerifier/src/com/android/cts/verifier/location/LocationVerifier.java
@@ -45,12 +45,14 @@
     private int mNumActiveUpdates = 0;
     private int mNumPassiveUpdates = 0;
     private boolean mRunning = false;
+    private boolean mActiveLocationArrive = false;
 
     private class ActiveListener implements LocationListener {
         @Override
         public void onLocationChanged(Location location) {
             if (!mRunning) return;
 
+            mActiveLocationArrive = true;
             mNumActiveUpdates++;
             scheduleTimeout();
 
@@ -95,6 +97,15 @@
             if (!mRunning) return;
             if (!location.getProvider().equals(mProvider)) return;
 
+            // When a test round start, passive listener shouldn't recevice location before active listener.
+            // If this situation occurs, we treat this location as overdue location.
+            // (The overdue location comes from previous test round, it occurs occasionally)
+            // We have to skip it to prevent wrong calculation of time interval.
+            if (!mActiveLocationArrive) {
+                mCb.log("ignoring passive " + mProvider + " update");
+                return;
+            }
+
             mNumPassiveUpdates++;
             long timestamp = location.getTime();
             long delta = timestamp - mLastPassiveTimestamp;
@@ -186,4 +197,4 @@
                 mProvider + " location change");
         return true;
     }
-}
\ No newline at end of file
+}