Replace java_files with sources in //media

Replace usages of java_files with sources in above directory's gn files,
and automatically format.

Bug: 1035074
Change-Id: I3923e1d2ee851e491ec35cd07186405b979bd0ab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1977197Reviewed-by: Ted Meyer <tmathmeyer@chromium.org>
Commit-Queue: Natalie Chouinard <chouinard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#726654}

media/base/android/BUILD.gn

@@ -178,7 +178,7 @@ if (is_android) {
       ":java_switches",
       "//media/base:java_enums",
     ]
-    java_files = [
+    sources = [
       "java/src/org/chromium/media/AudioManagerAndroid.java",
       "java/src/org/chromium/media/AudioTrackOutputStream.java",
       "java/src/org/chromium/media/BitrateAdjuster.java",
@@ -186,8 +186,8 @@ if (is_android) {
       "java/src/org/chromium/media/HdrMetadata.java",
       "java/src/org/chromium/media/MediaCodecBridge.java",
       "java/src/org/chromium/media/MediaCodecBridgeBuilder.java",
-      "java/src/org/chromium/media/MediaCodecUtil.java",
       "java/src/org/chromium/media/MediaCodecEncoder.java",
+      "java/src/org/chromium/media/MediaCodecUtil.java",
       "java/src/org/chromium/media/MediaDrmBridge.java",
       "java/src/org/chromium/media/MediaDrmSessionManager.java",
       "java/src/org/chromium/media/MediaDrmStorageBridge.java",
@@ -199,7 +199,7 @@ if (is_android) {
   }
 
   junit_binary("media_base_junit_tests") {
-    java_files = [
+    sources = [
       "java/src/test/org/chromium/media/AudioTrackOutputStreamTest.java",
       "java/src/test/org/chromium/media/BitrateAdjusterTest.java",
       "java/src/test/org/chromium/media/MediaFormatBuilderTest.java",

media/capture/content/android/BUILD.gn

@@ -40,6 +40,8 @@ android_library("screen_capture_java") {
     "//base:base_java",
     "//base:jni_java",
   ]
-  java_files = [ "java/src/org/chromium/media/ScreenCapture.java" ]
+  sources = [
+    "java/src/org/chromium/media/ScreenCapture.java",
+  ]
   annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
 }

media/capture/video/android/BUILD.gn

@@ -58,7 +58,7 @@ android_library("capture_java") {
 
   srcjar_deps = [ ":media_java_enums_srcjar" ]
 
-  java_files = [
+  sources = [
     "java/src/org/chromium/media/PhotoCapabilities.java",
     "java/src/org/chromium/media/VideoCapture.java",
     "java/src/org/chromium/media/VideoCaptureCamera.java",

media/midi/BUILD.gn

@@ -53,7 +53,7 @@ if (is_android) {
     ]
     annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
 
-    java_files = [
+    sources = [
       "java/src/org/chromium/midi/MidiDeviceAndroid.java",
       "java/src/org/chromium/midi/MidiInputPortAndroid.java",
       "java/src/org/chromium/midi/MidiManagerAndroid.java",