Increase stylus data timeout.

Sometimes stylus data will be delayed by 30 - 40ms. By increasing the
timeout we pretty much always pick up stylus data and the touch
latency feels surprisingly small.

Change-Id: I39f5b9037ce0444b1e957149d3f1c3a3137804cb

services/inputflinger/InputReader.cpp

@@ -71,7 +71,7 @@ static const size_t MAX_SLOTS = 32;
 
 // Maximum amount of latency to add to touch events while waiting for data from an
 // external stylus.
-static const nsecs_t EXTERNAL_STYLUS_DATA_TIMEOUT = ms2ns(32);
+static const constexpr nsecs_t EXTERNAL_STYLUS_DATA_TIMEOUT = ms2ns(72);
 
 // --- Static Functions ---