libhydra: Move kernel interface to libcharon

This moves hydra->kernel_interface to charon->kernel.

src/frontends/android/app/src/main/jni/libandroidbridge/backend/android_attr.c

@@ -18,7 +18,6 @@
 #include "android_attr.h"
 #include "../charonservice.h"
 
-#include <hydra.h>
 #include <utils/debug.h>
 #include <library.h>
 

src/frontends/android/app/src/main/jni/libandroidbridge/backend/android_dns_proxy.c

@@ -22,7 +22,7 @@
 
 #include "android_dns_proxy.h"
 
-#include <hydra.h>
+#include <daemon.h>
 #include <threading/rwlock.h>
 #include <collections/hashtable.h>
 #include <processing/jobs/callback_job.h>
@@ -121,8 +121,7 @@ static int open_socket(int family)
 		DBG1(DBG_NET, "could not open proxy socket: %s", strerror(errno));
 		return -1;
 	}
-	if (!hydra->kernel_interface->bypass_socket(hydra->kernel_interface,
-												skt, family))
+	if (!charon->kernel->bypass_socket(charon->kernel, skt, family))
 	{
 		DBG1(DBG_NET, "installing bypass policy for proxy socket failed");
 		close(skt);

src/frontends/android/app/src/main/jni/libandroidbridge/kernel/android_ipsec.c

@@ -19,7 +19,7 @@
 
 #include <utils/debug.h>
 #include <library.h>
-#include <hydra.h>
+#include <daemon.h>
 #include <ipsec.h>
 
 typedef struct private_kernel_android_ipsec_t private_kernel_android_ipsec_t;
@@ -42,8 +42,7 @@ struct private_kernel_android_ipsec_t {
  */
 static void expire(u_int8_t protocol, u_int32_t spi, host_t *dst, bool hard)
 {
-	hydra->kernel_interface->expire(hydra->kernel_interface, protocol,
-									spi, dst, hard);
+	charon->kernel->expire(charon->kernel, protocol, spi, dst, hard);
 }
 
 METHOD(kernel_ipsec_t, get_spi, status_t,

src/frontends/android/app/src/main/jni/libandroidbridge/kernel/android_net.c

@@ -20,7 +20,7 @@
 
 #include "../android_jni.h"
 #include "../charonservice.h"
-#include <hydra.h>
+#include <daemon.h>
 #include <processing/jobs/callback_job.h>
 #include <threading/mutex.h>
 
@@ -75,7 +75,7 @@ static job_requeue_t roam_event()
 {
 	/* this will fail if no connection is up */
 	charonservice->bypass_socket(charonservice, -1, 0);
-	hydra->kernel_interface->roam(hydra->kernel_interface, TRUE);
+	charon->kernel->roam(charon->kernel, TRUE);
 	return JOB_REQUEUE_NONE;
 }