Don't use IPC in isolateProcess

Fixes: 74395652
Test: hwuiunit passes in 'shell stop' state (pseudo-isolated process),
      manually checked non-isolated processes still have working vsync
      via systrace of RT animations demo

Change-Id: I630ea011dc7eb2efa265b25673d3304b3b2510d3
diff --git a/libs/hwui/Properties.h b/libs/hwui/Properties.h
index 3f44c21..81a3657 100644
--- a/libs/hwui/Properties.h
+++ b/libs/hwui/Properties.h
@@ -269,6 +269,7 @@
     static bool runningInEmulator;
 
     ANDROID_API static bool debuggingEnabled;
+    ANDROID_API static bool isolatedProcess;
 
 private:
     static ProfileType sProfileType;