Disable TaskSnapshots to fix crashes for DP.

Renderthread can't crash in system server if you don't
have Renderthread in system server.

Bug: 34817544
Bug: 34840652
Test: Basically a revert
Change-Id: Ic7384b8b1f22459f4a299a84425af91515a92551
diff --git a/core/java/android/app/ActivityManager.java b/core/java/android/app/ActivityManager.java
index efe72c3..fda9966 100644
--- a/core/java/android/app/ActivityManager.java
+++ b/core/java/android/app/ActivityManager.java
@@ -133,7 +133,7 @@
     public final static boolean ENABLE_TASK_SNAPSHOTS;
 
     static {
-        ENABLE_TASK_SNAPSHOTS = SystemProperties.getBoolean("persist.enable_task_snapshots", true);
+        ENABLE_TASK_SNAPSHOTS = SystemProperties.getBoolean("persist.enable_task_snapshots", false);
     }
 
     static final class UidObserver extends IUidObserver.Stub {