Use max acquired buffer setting to configStore

Change-Id: I48454243bcac12f5a83d080cd9115686f9f728ca
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 9df49f6..a63b9b4 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -118,6 +118,7 @@
 uint64_t SurfaceFlinger::maxVirtualDisplaySize;
 bool SurfaceFlinger::hasSyncFramework;
 bool SurfaceFlinger::useVrFlinger;
+int64_t SurfaceFlinger::maxFrameBufferAcquiredBuffers;
 
 SurfaceFlinger::SurfaceFlinger()
     :   BnSurfaceComposer(),
@@ -185,6 +186,9 @@
     useVrFlinger = getBool< ISurfaceFlingerConfigs,
             &ISurfaceFlingerConfigs::useVrFlinger>(false);
 
+    maxFrameBufferAcquiredBuffers = getInt64< ISurfaceFlingerConfigs,
+            &ISurfaceFlingerConfigs::maxFrameBufferAcquiredBuffers>(2);
+
     // debugging stuff...
     char value[PROPERTY_VALUE_MAX];
 
@@ -3226,6 +3230,8 @@
     result.appendFormat(" FORCE_HWC_FOR_RBG_TO_YUV=%d", useHwcForRgbToYuv);
     result.appendFormat(" MAX_VIRT_DISPLAY_DIM=%" PRIu64, maxVirtualDisplaySize);
     result.appendFormat(" RUNNING_WITHOUT_SYNC_FRAMEWORK=%d", !hasSyncFramework);
+    result.appendFormat(" NUM_FRAMEBUFFER_SURFACE_BUFFERS=%" PRId64,
+                        maxFrameBufferAcquiredBuffers);
     result.append("]");
 }