Creating new gn arg: enable_all_proguard_optimizations.

mojo/android/BUILD.gn

Index: mojo/android/BUILD.gn
diff --git a/mojo/android/BUILD.gn b/mojo/android/BUILD.gn
index 813701c85d0e5ce58af7ba729b5005de18d18257..325c6ce8cdc278bd907c6c3bd66ec50ff4a17968 100644
--- a/mojo/android/BUILD.gn
+++ b/mojo/android/BUILD.gn
@@ -8,9 +8,11 @@ group("android") {
   testonly = true
   deps = [
     ":mojo_javatests",
-    ":mojo_test_apk",
     ":system_java",
   ]
+  if (!enable_all_proguard_optimizations) {
+    deps += [ ":mojo_test_apk" ]
+  }
 }
 
 generate_jni("jni_headers") {
@@ -130,16 +132,18 @@ shared_library("mojo_java_unittests") {
   defines = [ "UNIT_TEST" ]
 }
 
-instrumentation_test_apk("mojo_test_apk") {
-  deps = [
-    ":mojo_javatests",
-    ":system_java",
-    "//base:base_java",
-    "//mojo/public/interfaces/bindings/tests:test_interfaces",
-    "//mojo/public/java:bindings",
-  ]
-  shared_libraries = [ ":mojo_java_unittests" ]
-  apk_name = "MojoTest"
-  android_manifest = "javatests/AndroidManifest.xml"
-  isolate_file = "../mojo_test_apk.isolate"
+if (!enable_all_proguard_optimizations) {
+  instrumentation_test_apk("mojo_test_apk") {
+    deps = [
+      ":mojo_javatests",
+      ":system_java",
+      "//base:base_java",
+      "//mojo/public/interfaces/bindings/tests:test_interfaces",
+      "//mojo/public/java:bindings",
+    ]
+    shared_libraries = [ ":mojo_java_unittests" ]
+    apk_name = "MojoTest"
+    android_manifest = "javatests/AndroidManifest.xml"
+    isolate_file = "../mojo_test_apk.isolate"
+  }
 }