otautil: Factor out the utils that're private to recovery.

A number of utility functions are intended for serving recovery's own
use. Exposing them via libotautil (which is a static lib) would pass the
dependencies onto libotautil's users (e.g. recovery image, updater, host
simulator, device-specific recovery UI/updater extensions etc). This CL
finds a new home for the utils that are private to recovery.

Test: mmma bootable/recovery
Change-Id: I575e97ad099b85fe1c1c8c7c9458a5a43d4e11e1
diff --git a/recovery-persist.cpp b/recovery-persist.cpp
index 294017a..6dbf862 100644
--- a/recovery-persist.cpp
+++ b/recovery-persist.cpp
@@ -43,8 +43,8 @@
 #include <metricslogger/metrics_logger.h>
 #include <private/android_logger.h> /* private pmsg functions */
-#include "otautil/logging.h"
-#include "otautil/parse_install_logs.h"
+#include "recovery_utils/logging.h"
+#include "recovery_utils/parse_install_logs.h"
 constexpr const char* LAST_LOG_FILE = "/data/misc/recovery/last_log";
 constexpr const char* LAST_PMSG_FILE = "/sys/fs/pstore/pmsg-ramoops-0";