[M71] Revert "[M71] Revert "Fix the timezone detection on Windows wit…

…h RDP.""

This reverts commit 751b643, which reverted the following earlier commit
(ccad447) to deal with a regression on Windows 7 timezone detection.
(https://crbug.com/913298)

This CL will reintroduce the change made in ccad447 for bug 854387 to
M71 branch and be followed by the proper fix for bug 913298.

> Fix the timezone detection on Windows with RDP.
>
> This is to cherry-pick fixes from the upstream to fix
> the timezone detection issue when a remote Windows
> session is used. The detected timezone should be that of
> a remote machine Chrome is running on, but without this
> fix, it uses the timezone of machine where a RDP connection
> originates.
>
> Bugs:
>
> https://unicode-org.atlassian.net/browse/ICU-13842
> https://unicode-org.atlassian.net/browse/ICU-13827
>
> Fixes (included in the upstream ICU 63 release candidate)
> unicode-org/icu#55
> unicode-org/icu#129
>
> TBR=yangguo@chromium.org
> Bug: 854387
> Test: Manual. See the bug
> Change-Id: Ic21e82987c1569e107d9b5e17bdc0d21e65fda3c
> Reviewed-on: https://chromium-review.googlesource.com/c/1270635

Bug: 854387, 913298
Test: Manual. See the bug

README.chromium

@@ -289,7 +289,17 @@ D. Local Modifications
     https://unicode-org.atlassian.net/browse/ICU-20140
   - fix: https://github.com/unicode-org/icu/pull/136
 
-15. Align memory buffer used in UnicodeSet on ARM.
+15. Cherry pick an upstream patch for Windows timezone detection
+
+  - patches/wintz_detection.patch
+  - upstream bugs:
+    https://unicode-org.atlassian.net/browse/ICU-13842
+    https://unicode-org.atlassian.net/browse/ICU-13827
+  - fixes:
+      https://github.com/unicode-org/icu/pull/55
+      https://github.com/unicode-org/icu/pull/129
+
+16. Align memory buffer used in UnicodeSet on ARM.
 
   - patches/arm_align.patch
   - upstream bug: