Update ICU to ICU 70-1 with tests

Size Impact:
Android   +143K
Cast      -143K
ChromeOS  -154.7K
Common    -159K
flutter   -123.1K
iOS       -157.6K
Diary https://docs.google.com/document/d/1NqMw7DAVFCZRx67auC7sgOvrikHvCYuaB87JUf21yG8

Bug: 1260116
Change-Id: I90102bf8c5a9d54a59658b2d2f7fb25b405917ad
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/deps/icu/+/3268349
Reviewed-by: Jungshik Shin <jshin@chromium.org>
diff --git a/source/common/messagepattern.cpp b/source/common/messagepattern.cpp
index f223d06..66fd2f4 100644
--- a/source/common/messagepattern.cpp
+++ b/source/common/messagepattern.cpp
@@ -309,10 +309,10 @@
     numericValuesLength=0;
 }
 
-UBool
+bool
 MessagePattern::operator==(const MessagePattern &other) const {
     if(this==&other) {
-        return TRUE;
+        return true;
     }
     return
         aposMode==other.aposMode &&
@@ -387,10 +387,10 @@
 
 // MessagePattern::Part ---------------------------------------------------- ***
 
-UBool
+bool
 MessagePattern::Part::operator==(const Part &other) const {
     if(this==&other) {
-        return TRUE;
+        return true;
     }
     return
         type==other.type &&