logd: rename LogTimes -> LogReaderThread

LogTimes has evolved from being simply a store of the last timestamp
that each reader has read to being a class representing an individual
reader thread, including the thread function, so name it
appropriately.

Test: logging unit tests
Change-Id: I6914824376a6ff1f7509e657fa4dc044ead62954
diff --git a/logd/Android.bp b/logd/Android.bp
index 2663271..b6d30cd 100644
--- a/logd/Android.bp
+++ b/logd/Android.bp
@@ -36,9 +36,9 @@
         "CommandListener.cpp",
         "LogListener.cpp",
         "LogReader.cpp",
+        "LogReaderThread.cpp",
         "LogBuffer.cpp",
         "LogBufferElement.cpp",
-        "LogTimes.cpp",
         "LogStatistics.cpp",
         "LogWhiteBlackList.cpp",
         "libaudit.c",