Relaunch activity resumed if it got resumed before relaunching.

This fixes following scenario:
1) first activity starts second activity and expects results; first
activity gets paused;
2) second activity finishes and returns a result;
3) first activity is still paused and receives the result from the second
activity; first activty requests a local relaunch; relaunch gets
scheduled and is marked as launching paused (because the activity is
still paused)
4) first activity resumes;
5) first activity relaunches and finishes in paused state.

The fix makes it drop the information about launching paused when it
gets resumed in step 4.

Bug: 25674611
Change-Id: Ieeef3f0d5c311679882fdc59c13fd8a99e3d3a20
diff --git a/core/java/android/app/ActivityThread.java b/core/java/android/app/ActivityThread.java
index 7b01953..37b861e 100644
--- a/core/java/android/app/ActivityThread.java
+++ b/core/java/android/app/ActivityThread.java
@@ -3300,6 +3300,17 @@
                 }
                 r.activity.performResume();
 
+                // If there is a pending relaunch that was requested when the activity was paused,
+                // it will put the activity into paused state when it finally happens. Since the
+                // activity resumed before being relaunched, we don't want that to happen, so we
+                // need to clear the request to relaunch paused.
+                for (int i = mRelaunchingActivities.size() - 1; i >= 0; i--) {
+                    final ActivityClientRecord relaunching = mRelaunchingActivities.get(i);
+                    if (relaunching.token == r.token && relaunching.startsNotResumed) {
+                        relaunching.startsNotResumed = false;
+                    }
+                }
+
                 EventLog.writeEvent(LOG_AM_ON_RESUME_CALLED,
                         UserHandle.myUserId(), r.activity.getComponentName().getClassName());
 
@@ -3528,6 +3539,7 @@
     private void handlePauseActivity(IBinder token, boolean finished,
             boolean userLeaving, int configChanges, boolean dontReport, int seq) {
         ActivityClientRecord r = mActivities.get(token);
+        if (DEBUG_ORDER) Slog.d(TAG, "handlePauseActivity " + r + ", seq: " + seq);
         if (!checkAndUpdateLifecycleSeq(seq, r, "pauseActivity")) {
             return;
         }
@@ -4167,6 +4179,7 @@
         synchronized (mResourcesManager) {
             for (int i=0; i<mRelaunchingActivities.size(); i++) {
                 ActivityClientRecord r = mRelaunchingActivities.get(i);
+                if (DEBUG_ORDER) Slog.d(TAG, "requestRelaunchActivity: " + this + ", trying: " + r);
                 if (r.token == token) {
                     target = r;
                     if (pendingResults != null) {
@@ -4197,14 +4210,19 @@
             }
 
             if (target == null) {
+                if (DEBUG_ORDER) Slog.d(TAG, "requestRelaunchActivity: target is null, fromServer:"
+                        + fromServer);
                 target = new ActivityClientRecord();
                 target.token = token;
                 target.pendingResults = pendingResults;
                 target.pendingIntents = pendingNewIntents;
                 target.mPreserveWindow = preserveWindow;
                 if (!fromServer) {
-                    ActivityClientRecord existing = mActivities.get(token);
+                    final ActivityClientRecord existing = mActivities.get(token);
+                    if (DEBUG_ORDER) Slog.d(TAG, "requestRelaunchActivity: " + existing);
                     if (existing != null) {
+                        if (DEBUG_ORDER) Slog.d(TAG, "requestRelaunchActivity: paused= "
+                                + existing.paused);;
                         target.startsNotResumed = existing.paused;
                         target.overrideConfig = existing.overrideConfig;
                     }
@@ -4227,8 +4245,8 @@
             target.pendingConfigChanges |= configChanges;
             target.relaunchSeq = getLifecycleSeq();
         }
-        if (DEBUG_ORDER) Slog.d(TAG, "relaunchActivity " + ActivityThread.this
-                + " operation received seq: " + target.relaunchSeq);
+        if (DEBUG_ORDER) Slog.d(TAG, "relaunchActivity " + ActivityThread.this + ", target "
+                + target + " operation received seq: " + target.relaunchSeq);
     }
 
     private void handleRelaunchActivity(ActivityClientRecord tmp) {