Add missing juniversalchardet dependency of the mime-type library

The plugin uses org.overviewproject:mime-types 2.0.0 which requires
com.github.albfernandez:juniversalchardet as a transitive dependency.

Change-Id: I4ba92666f5b6290dadf8a48ab7270d3fac949a06

BUILD

diff --git a/BUILD b/BUILD
index e7b7df1..82ba9ba 100644
--- a/BUILD
+++ b/BUILD
@@ -12,6 +12,7 @@
     ],
     resources = glob(["src/main/resources/**/*"]),
     deps = [
+        "@juniversalchardet//jar",
         "@mime-types//jar",
     ],
 )
@@ -19,6 +20,7 @@
 TEST_DEPS = PLUGIN_DEPS + PLUGIN_TEST_DEPS + [
     "@commons-io//jar",
     "@mime-types//jar",
+    "@juniversalchardet//jar",
     ":uploadvalidator__plugin",
 ]
 
@@ -41,7 +43,8 @@
     name = "uploadvalidator_tests",
     testonly = 1,
     srcs = glob(
-        ["src/test/java/**/*Test.java"]),
+        ["src/test/java/**/*Test.java"],
+    ),
     tags = ["uploadvalidator"],
     deps = TEST_DEPS + [
         ":testutils",
@@ -52,7 +55,8 @@
     name = "uploadvalidator_integration_tests",
     testonly = 1,
     srcs = glob(
-        ["src/test/java/**/*IT.java"]),
+        ["src/test/java/**/*IT.java"],
+    ),
     tags = ["uploadvalidator"],
     deps = TEST_DEPS + [
         ":testutils",

external_plugin_deps.bzl

diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index 6ef4aa8..c56b92d 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -10,4 +10,9 @@
         name = "mime-types",
         artifact = "org.overviewproject:mime-types:0.1.3",
         sha1 = "63ebd860cdad2f8a5fec89ae3238970607d943a3",
-    )
\ No newline at end of file
+    )
+    maven_jar(
+        name = "juniversalchardet",
+        artifact = "com.github.albfernandez:juniversalchardet:2.5.0",
+        sha1 = "423123a1ddfe458d07948bc09cfa0170037a9e3d",
+    )