AudioFlinger: Fix timestamp advancing interval constant

Prior value caused false underrun detection and pause
for Direct and Offload playback.

Test: atest android.media.decoder.cts.DecoderTest#testTunneledAudioUnderrunVp9
Bug: 317163842
Change-Id: I0e25e425102bfa176e96b7d14553f13d7135292d
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 4c6b02c..01e7b0d 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -185,7 +185,7 @@
 // Minimum amount of time between checking to see if the timestamp is advancing
 // for underrun detection. If we check too frequently, we may not detect a
 // timestamp update and will falsely detect underrun.
-static const nsecs_t kMinimumTimeBetweenTimestampChecksNs = 150 /* ms */ * 1000;
+static constexpr nsecs_t kMinimumTimeBetweenTimestampChecksNs = 150 /* ms */ * 1'000'000;
 
 // The universal constant for ubiquitous 20ms value. The value of 20ms seems to provide a good
 // balance between power consumption and latency, and allows threads to be scheduled reliably