Revert of Creating libwebrtc bundle jar (patchset #4 id:60001 of https://codereview.webrtc.org/2646443002/ )

Reason for revert:
This breaks some chromium.webrtc.fyi buildbots with the following error:

ERROR Unresolved dependencies.
//third_party/webrtc/base:base(//build/toolchain/android:android_arm)
  needs //third_party/webrtc/base:base_java(//build/toolchain/android:android_arm)

Original issue's description:
> Creating libwebrtc bundle jar
>
> Creates a JAR which includes:
> - //webrtc/base:base_java
> - //webrtc/modules/audio_device:audio_device_java
> - //webrtc/sdk/android:libjingle_peerconnection_java
> - //webrtc/sdk/android:libjingle_peerconnection_metrics_default_java
>
> The libwebrtc.jar file will be generated at '<output_dir>/lib.java/webrtc/sdk/android/libwebrtc.jar'.
>
> BUG=webrtc:6356
>
> Review-Url: https://codereview.webrtc.org/2646443002
> Cr-Commit-Position: refs/heads/master@{#16189}
> Committed: a62a82b7e7

TBR=kjellander@webrtc.org,sakal@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6356

Review-Url: https://codereview.webrtc.org/2640023010
Cr-Commit-Position: refs/heads/master@{#16190}

webrtc/base/BUILD.gn

@@ -942,7 +942,7 @@ if (rtc_include_tests) {
   }
 }
 
-if (!build_with_chromium && is_android) {
+if (is_android) {
   android_library("base_java") {
     java_files = [
       "java/src/org/webrtc/Logging.java",

webrtc/build/webrtc.gni

@@ -327,3 +327,32 @@ template("rtc_shared_library") {
     }
   }
 }
+
+# TODO(mbonadei): Merge this in android_library or create an
+# rtc_android_library. Waiting for hints from chromium:648244.
+if (is_android) {
+  template("android_shared_srcjar") {
+    action(target_name) {
+      check_includes = false
+      set_sources_assignment_filter([])
+      assert(defined(invoker.sources))
+
+      forward_variables_from(invoker,
+                             [
+                               "sources",
+                               "testonly",
+                               "visibility",
+                             ])
+      script = "//webrtc/build/generate_srcjar.py"
+      _srcjar_path = "${target_gen_dir}/${target_name}.srcjar"
+      _rebased_srcjar_path = rebase_path(_srcjar_path, root_build_dir)
+      _rebased_sources = rebase_path(invoker.sources, root_build_dir)
+
+      args = [ "--srcjar=$_rebased_srcjar_path" ] + _rebased_sources
+
+      outputs = [
+        _srcjar_path,
+      ]
+    }
+  }
+}

webrtc/examples/BUILD.gn

@@ -93,7 +93,6 @@ if (is_android) {
       ":AppRTCMobile_resources",
       "//webrtc/base:base_java",
       "//webrtc/examples/androidapp/third_party/autobanh:autobanh_java",
-      "//webrtc/modules/audio_device:audio_device_java",
       "//webrtc/sdk/android:libjingle_peerconnection_java",
       "//webrtc/sdk/android:libjingle_peerconnection_metrics_default_java",
     ]

webrtc/modules/audio_device/BUILD.gn

@@ -347,8 +347,8 @@ if (rtc_include_tests) {
 }
 
 if (!build_with_chromium && is_android) {
-  android_library("audio_device_java") {
-    java_files = [
+  android_shared_srcjar("audio_device_java") {
+    sources = [
       "android/java/src/org/webrtc/voiceengine/BuildInfo.java",
       "android/java/src/org/webrtc/voiceengine/WebRtcAudioEffects.java",
       "android/java/src/org/webrtc/voiceengine/WebRtcAudioManager.java",
@@ -356,8 +356,5 @@ if (!build_with_chromium && is_android) {
       "android/java/src/org/webrtc/voiceengine/WebRtcAudioTrack.java",
       "android/java/src/org/webrtc/voiceengine/WebRtcAudioUtils.java",
     ]
-    deps = [
-      "//webrtc/base:base_java",
-    ]
   }
 }

webrtc/sdk/android/BUILD.gn

@@ -110,19 +110,6 @@ rtc_shared_library("libjingle_peerconnection_so") {
   output_extension = "so"
 }
 
-dist_jar("libwebrtc") {
-  _target_dir_name = get_label_info(":$target_name", "dir")
-  output = "${root_out_dir}/lib.java${_target_dir_name}/${target_name}.jar"
-  direct_deps_only = true
-  use_interface_jars = false
-  deps = [
-    ":libjingle_peerconnection_java",
-    ":libjingle_peerconnection_metrics_default_java",
-    "//webrtc/base:base_java",
-    "//webrtc/modules/audio_device:audio_device_java",
-  ]
-}
-
 android_library("libjingle_peerconnection_java") {
   java_files = [
     "api/org/webrtc/AudioSource.java",
@@ -184,8 +171,9 @@ android_library("libjingle_peerconnection_java") {
 
   deps = [
     "//webrtc/base:base_java",
-    "//webrtc/modules/audio_device:audio_device_java",
   ]
+
+  srcjar_deps = [ "//webrtc/modules/audio_device:audio_device_java" ]
 }
 
 android_library("libjingle_peerconnection_metrics_default_java") {