Fix Android+CPP build

src/core/lib/support/cpu_linux.c

@@ -37,7 +37,7 @@
 
 #include <grpc/support/port_platform.h>
 
-#ifdef GPR_CPU_LINUX
+#if defined (GPR_CPU_LINUX) && !defined (GPR_ANDROID)
 
 #include <errno.h>
 #include <sched.h>

src/core/lib/support/cpu_posix.c

@@ -33,7 +33,7 @@
 
 #include <grpc/support/port_platform.h>
 
-#ifdef GPR_CPU_POSIX
+#if defined (GPR_CPU_POSIX) || defined (GPR_ANDROID)
 
 #include <errno.h>
 #include <string.h>

src/core/lib/support/log_linux.c

@@ -41,7 +41,7 @@
 
 #include <grpc/support/port_platform.h>
 
-#ifdef GPR_LINUX_LOG
+#if defined(GPR_LINUX_LOG) && !defined(GPR_ANDROID)
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>

src/core/lib/support/log_posix.c

@@ -33,7 +33,7 @@
 
 #include <grpc/support/port_platform.h>
 
-#if defined(GPR_POSIX_LOG)
+#if defined (GPR_POSIX_LOG) && !defined (GPR_ANDROID)
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>