Rename "retire" to "present" for consistency

The HWC2 model has no concept of retire fence beyond HWC2to1Adapter
All references to "retire" fence should be called "present"

Change-Id: I26540aad9e65f138a4df60a34eaee030f1c17567
diff --git a/services/surfaceflinger/DisplayHardware/HWC2.cpp b/services/surfaceflinger/DisplayHardware/HWC2.cpp
index 31af8a1..dd909aa 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWC2.cpp
@@ -924,21 +924,21 @@
     return Error::None;
 }
 
-Error Display::present(sp<Fence>* outRetireFence)
+Error Display::present(sp<Fence>* outPresentFence)
 {
-    int32_t retireFenceFd = 0;
+    int32_t presentFenceFd = 0;
 #ifdef BYPASS_IHWC
     int32_t intError = mDevice.mPresentDisplay(mDevice.mHwcDevice, mId,
-            &retireFenceFd);
+            &presentFenceFd);
 #else
-    auto intError = mDevice.mComposer->presentDisplay(mId, retireFenceFd);
+    auto intError = mDevice.mComposer->presentDisplay(mId, presentFenceFd);
 #endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None) {
         return error;
     }
 
-    *outRetireFence = new Fence(retireFenceFd);
+    *outPresentFence = new Fence(presentFenceFd);
     return Error::None;
 }