audio flinger: add suffix to time variables names

Add suffix to clarify units for the following variables:
 standbyTime -> mStandbyTimeNs
 standbyDelay -> mStandbyDelayNs
 activeSleepTime -> mActiveSleepTimeUs
 idleSleepTime -> mIdleSleepTimeUs
 sleepTime -> mSleepTimeUs

Change-Id: I7f5d602c39e0ef3f6fe9ef99eaf1b351c7bd4fc3
diff --git a/services/audioflinger/Threads.h b/services/audioflinger/Threads.h
index aa20525..07c226e 100644
--- a/services/audioflinger/Threads.h
+++ b/services/audioflinger/Threads.h
@@ -755,14 +755,14 @@
     bool                            mInWrite;
 
     // FIXME rename these former local variables of threadLoop to standard "m" names
-    nsecs_t                         standbyTime;
+    nsecs_t                         mStandbyTimeNs;
     size_t                          mSinkBufferSize;
 
     // cached copies of activeSleepTimeUs() and idleSleepTimeUs() made by cacheParameters_l()
-    uint32_t                        activeSleepTime;
-    uint32_t                        idleSleepTime;
+    uint32_t                        mActiveSleepTimeUs;
+    uint32_t                        mIdleSleepTimeUs;
 
-    uint32_t                        sleepTime;
+    uint32_t                        mSleepTimeUs;
 
     // mixer status returned by prepareTracks_l()
     mixer_state                     mMixerStatus; // current cycle
@@ -775,7 +775,7 @@
     uint32_t                        sleepTimeShift;
 
     // same as AudioFlinger::mStandbyTimeInNsecs except for DIRECT which uses a shorter value
-    nsecs_t                         standbyDelay;
+    nsecs_t                         mStandbyDelayNs;
 
     // MIXER only
     nsecs_t                         maxPeriod;