Update EG2 build file

Move to 4 targets:
common_lib, ui_lib, test_lib, app_framework

Based on the EG2 xcodeproject on github.

Also rolled EG2 to a more recent commit hash.

Bug: 906201
Change-Id: Ifee6d4de17d8df930ac4760714ee32b0cab89cb5
Reviewed-on: https://chromium-review.googlesource.com/c/1340531Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Commit-Queue: Lindsay Pasricha <lindsayw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611338}

DEPS

@@ -307,7 +307,7 @@ deps = {
   },
 
   'src/ios/third_party/earl_grey2/src': {
-      'url': Var('chromium_git') + '/external/github.com/google/EarlGrey.git' + '@' + 'f9ae5c477b3b1f8e38559867ca21dfb034c21d92',
+      'url': Var('chromium_git') + '/external/github.com/google/EarlGrey.git' + '@' + '3f9a3f28029bb7547b799a74458e45484b4a55f9',
       'condition': 'checkout_ios',
   },
 

ios/third_party/earl_grey2/Info.plist

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleVersion</key>
+  <string>1.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleIdentifier</key>
+  <string>${IOS_BUNDLE_ID_PREFIX}.test.${EXECUTABLE_NAME:rfc1034identifier}</string>
+  <key>CFBundleExecutable</key>
+  <string>${EXECUTABLE_NAME}</string>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>English</string>
+</dict>
+</plist>
\ No newline at end of file