(4) Rename files to snake_case: update BUILD.gn, include paths, header guards, and DEPS entries

Mechanically generated by running this command:

tools_webrtc/do-renames.sh update all-renames.txt && git cl format

Then manually updating:

tools_webrtc/sanitizers/tsan_suppressions_webrtc.cc

Bug: webrtc:10159
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I54824cd91dada8fc3ee3d098f971bc319d477833
Reviewed-on: https://webrtc-review.googlesource.com/c/115653
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26226}
diff --git a/examples/androidnativeapi/BUILD.gn b/examples/androidnativeapi/BUILD.gn
index 6fdd36c..2d0438b 100644
--- a/examples/androidnativeapi/BUILD.gn
+++ b/examples/androidnativeapi/BUILD.gn
@@ -37,8 +37,8 @@
   rtc_shared_library("examples_androidnativeapi_jni") {
     testonly = true
     sources = [
-      "jni/androidcallclient.cc",
-      "jni/androidcallclient.h",
+      "jni/android_call_client.cc",
+      "jni/android_call_client.h",
       "jni/onload.cc",
     ]
 
diff --git a/examples/androidnativeapi/jni/android_call_client.cc b/examples/androidnativeapi/jni/android_call_client.cc
index e0dc8cc..119444b 100644
--- a/examples/androidnativeapi/jni/android_call_client.cc
+++ b/examples/androidnativeapi/jni/android_call_client.cc
@@ -8,20 +8,20 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "examples/androidnativeapi/jni/androidcallclient.h"
+#include "examples/androidnativeapi/jni/android_call_client.h"
 
 #include <utility>
 
 #include "absl/memory/memory.h"
 #include "api/audio_codecs/builtin_audio_decoder_factory.h"
 #include "api/audio_codecs/builtin_audio_encoder_factory.h"
-#include "api/peerconnectioninterface.h"
+#include "api/peer_connection_interface.h"
 #include "api/video/builtin_video_bitrate_allocator_factory.h"
 #include "examples/androidnativeapi/generated_jni/jni/CallClient_jni.h"
 #include "logging/rtc_event_log/rtc_event_log_factory.h"
-#include "media/engine/internaldecoderfactory.h"
-#include "media/engine/internalencoderfactory.h"
-#include "media/engine/webrtcmediaengine.h"
+#include "media/engine/internal_decoder_factory.h"
+#include "media/engine/internal_encoder_factory.h"
+#include "media/engine/webrtc_media_engine.h"
 #include "modules/audio_processing/include/audio_processing.h"
 #include "sdk/android/native_api/jni/java_types.h"
 #include "sdk/android/native_api/video/wrapper.h"
diff --git a/examples/androidnativeapi/jni/android_call_client.h b/examples/androidnativeapi/jni/android_call_client.h
index d456e9c..5ab61f4 100644
--- a/examples/androidnativeapi/jni/android_call_client.h
+++ b/examples/androidnativeapi/jni/android_call_client.h
@@ -8,20 +8,20 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef EXAMPLES_ANDROIDNATIVEAPI_JNI_ANDROIDCALLCLIENT_H_
-#define EXAMPLES_ANDROIDNATIVEAPI_JNI_ANDROIDCALLCLIENT_H_
+#ifndef EXAMPLES_ANDROIDNATIVEAPI_JNI_ANDROID_CALL_CLIENT_H_
+#define EXAMPLES_ANDROIDNATIVEAPI_JNI_ANDROID_CALL_CLIENT_H_
 
 #include <jni.h>
 
 #include <memory>
 #include <string>
 
-#include "api/peerconnectioninterface.h"
-#include "rtc_base/criticalsection.h"
+#include "api/peer_connection_interface.h"
+#include "rtc_base/critical_section.h"
 #include "rtc_base/scoped_ref_ptr.h"
 #include "rtc_base/thread_checker.h"
 #include "sdk/android/native_api/jni/scoped_java_ref.h"
-#include "sdk/android/native_api/video/videosource.h"
+#include "sdk/android/native_api/video/video_source.h"
 
 namespace webrtc_examples {
 
@@ -76,4 +76,4 @@
 
 }  // namespace webrtc_examples
 
-#endif  // EXAMPLES_ANDROIDNATIVEAPI_JNI_ANDROIDCALLCLIENT_H_
+#endif  // EXAMPLES_ANDROIDNATIVEAPI_JNI_ANDROID_CALL_CLIENT_H_
diff --git a/examples/androidnativeapi/jni/onload.cc b/examples/androidnativeapi/jni/onload.cc
index 4b4b5d9..6ea5275 100644
--- a/examples/androidnativeapi/jni/onload.cc
+++ b/examples/androidnativeapi/jni/onload.cc
@@ -11,7 +11,7 @@
 #include <jni.h>
 
 #include "modules/utility/include/jvm_android.h"
-#include "rtc_base/ssladapter.h"
+#include "rtc_base/ssl_adapter.h"
 #include "sdk/android/native_api/base/init.h"
 
 namespace webrtc_examples {