Revert "Replace usage of ICU4C in bionic with ICU4X"

Revert submission 3511934-ICU4X-in-Bionic_2

Reason for revert: DroidMonitor: Culprit for http://b/400532776 - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Reverted changes: /q/submissionid:3511934-ICU4X-in-Bionic_2

Change-Id: I936ee9f33dee4cfbd849b0066ea7765f3e8b254a
diff --git a/libc/Android.bp b/libc/Android.bp
index e6f69c2..b5ff680 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -790,53 +790,6 @@
 }
 
 // ========================================================
-// icu4x_bionic.a - Thin Rust wrapper around ICU4X
-// ========================================================
-
-rust_ffi_static {
-    name: "libicu4x_bionic",
-    crate_name: "icu4x_bionic",
-    crate_root: "bionic/icu4x.rs",
-    edition: "2021",
-    features: [],
-    rustlibs: [
-        "//external/rust/android-crates-io/crates/icu_casemap:libicu_casemap",
-        "//external/rust/android-crates-io/crates/icu_collections:libicu_collections",
-        "//external/rust/android-crates-io/crates/icu_properties:libicu_properties",
-    ],
-    apex_available: [
-        "//apex_available:platform",
-        "//apex_available:anyapex",
-    ],
-    vendor_available: true,
-    product_available: true,
-    ramdisk_available: true,
-    vendor_ramdisk_available: true,
-    recovery_available: true,
-    native_bridge_supported: true,
-    sdk_version: "minimum",
-    defaults: ["linux_bionic_supported"],
-}
-
-// current rust implementation detail; will be removed as part of a larger cleanup later
-// go/android-mto-staticlibs-in-make
-cc_rustlibs_for_make {
-    name: "libstatic_rustlibs_for_make",
-    whole_static_libs: ["libicu4x_bionic"],
-    apex_available: [
-        "//apex_available:platform",
-        "//apex_available:anyapex",
-    ],
-    vendor_available: true,
-    product_available: true,
-    ramdisk_available: true,
-    vendor_ramdisk_available: true,
-    recovery_available: true,
-    native_bridge_supported: true,
-    defaults: ["linux_bionic_supported"],
-}
-
-// ========================================================
 // libc_bionic.a - home-grown C library code
 // ========================================================
 
@@ -917,6 +870,7 @@
         "bionic/grp_pwd_file.cpp",
         "bionic/heap_zero_init.cpp",
         "bionic/iconv.cpp",
+        "bionic/icu_wrappers.cpp",
         "bionic/ifaddrs.cpp",
         "bionic/inotify_init.cpp",
         "bionic/ioctl.cpp",
@@ -1228,7 +1182,6 @@
     whole_static_libs: [
         "//external/llvm-libc:llvmlibc",
         "libsystemproperties",
-        "libicu4x_bionic",
     ],
 
     cppflags: ["-Wold-style-cast"],
@@ -1480,6 +1433,7 @@
         "bionic/android_mallopt.cpp",
         "bionic/gwp_asan_wrappers.cpp",
         "bionic/heap_tagging.cpp",
+        "bionic/icu.cpp",
         "bionic/malloc_common.cpp",
         "bionic/malloc_common_dynamic.cpp",
         "bionic/android_profiling_dynamic.cpp",
@@ -1498,6 +1452,7 @@
         "bionic/android_mallopt.cpp",
         "bionic/gwp_asan_wrappers.cpp",
         "bionic/heap_tagging.cpp",
+        "bionic/icu_static.cpp",
         "bionic/malloc_common.cpp",
         "bionic/malloc_limit.cpp",
     ],