system/core: preparation to pull back interfaces from android/log.h

Point to log/log.h where necessary, define LOG_TAG where necessary.
Accept that private/android_logger.h is suitable replacement for
log/logger.h and android/log.h.

Correct liblog/README

Effectively a cleanup and controlled select revert of
'system/core: drop or replace log/logger.h' and
'system/core: Replace log/log.h with android/log.h'.

Test: compile
Bug: 30465923
Change-Id: Ic2ad157bad6f5efe2c6af293a73bb753300b17a2
diff --git a/libsysutils/src/FrameworkCommand.cpp b/libsysutils/src/FrameworkCommand.cpp
index dccacda..a6c4abc 100644
--- a/libsysutils/src/FrameworkCommand.cpp
+++ b/libsysutils/src/FrameworkCommand.cpp
@@ -18,7 +18,7 @@
 
 #include <errno.h>
 
-#include <android/log.h>
+#include <log/log.h>
 #include <sysutils/FrameworkCommand.h>
 
 #define UNUSED __attribute__((unused))
diff --git a/libsysutils/src/FrameworkListener.cpp b/libsysutils/src/FrameworkListener.cpp
index b96174a..52f28af 100644
--- a/libsysutils/src/FrameworkListener.cpp
+++ b/libsysutils/src/FrameworkListener.cpp
@@ -19,8 +19,9 @@
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
-#include <android/log.h>
+#include <log/log.h>
 #include <sysutils/FrameworkCommand.h>
 #include <sysutils/FrameworkListener.h>
 #include <sysutils/SocketClient.h>
diff --git a/libsysutils/src/NetlinkEvent.cpp b/libsysutils/src/NetlinkEvent.cpp
index b787692..fef801a 100644
--- a/libsysutils/src/NetlinkEvent.cpp
+++ b/libsysutils/src/NetlinkEvent.cpp
@@ -41,7 +41,7 @@
 const int LOCAL_QLOG_NL_EVENT = 112;
 const int LOCAL_NFLOG_PACKET = NFNL_SUBSYS_ULOG << 8 | NFULNL_MSG_PACKET;
 
-#include <android/log.h>
+#include <log/log.h>
 #include <sysutils/NetlinkEvent.h>
 
 NetlinkEvent::NetlinkEvent() {
diff --git a/libsysutils/src/NetlinkListener.cpp b/libsysutils/src/NetlinkListener.cpp
index 1c4c7df..896dad3 100644
--- a/libsysutils/src/NetlinkListener.cpp
+++ b/libsysutils/src/NetlinkListener.cpp
@@ -20,11 +20,12 @@
 #include <string.h>
 #include <sys/socket.h>
 #include <sys/types.h>
+#include <unistd.h>
 
 #include <linux/netlink.h> /* out of order because must follow sys/socket.h */
 
-#include <android/log.h>
 #include <cutils/uevent.h>
+#include <log/log.h>
 #include <sysutils/NetlinkEvent.h>
 
 #if 1
diff --git a/libsysutils/src/ServiceManager.cpp b/libsysutils/src/ServiceManager.cpp
index 1abe988..13bac09 100644
--- a/libsysutils/src/ServiceManager.cpp
+++ b/libsysutils/src/ServiceManager.cpp
@@ -17,10 +17,12 @@
 #define LOG_TAG "Service"
 
 #include <errno.h>
+#include <stdio.h>
 #include <string.h>
+#include <unistd.h>
 
-#include <android/log.h>
 #include <cutils/properties.h>
+#include <log/log.h>
 #include <sysutils/ServiceManager.h>
 
 ServiceManager::ServiceManager() {
diff --git a/libsysutils/src/SocketClient.cpp b/libsysutils/src/SocketClient.cpp
index 02505d3..971f908 100644
--- a/libsysutils/src/SocketClient.cpp
+++ b/libsysutils/src/SocketClient.cpp
@@ -25,8 +25,9 @@
 #include <string.h>
 #include <sys/socket.h>
 #include <sys/types.h>
+#include <unistd.h>
 
-#include <android/log.h>
+#include <log/log.h>
 #include <sysutils/SocketClient.h>
 
 SocketClient::SocketClient(int socket, bool owned) {
diff --git a/libsysutils/src/SocketListener.cpp b/libsysutils/src/SocketListener.cpp
index 6a676a9..3f8f3db 100644
--- a/libsysutils/src/SocketListener.cpp
+++ b/libsysutils/src/SocketListener.cpp
@@ -24,9 +24,10 @@
 #include <sys/time.h>
 #include <sys/types.h>
 #include <sys/un.h>
+#include <unistd.h>
 
-#include <android/log.h>
 #include <cutils/sockets.h>
+#include <log/log.h>
 #include <sysutils/SocketListener.h>
 #include <sysutils/SocketClient.h>