[Observation] We should be importing Android, not Bionic.

Apparently the right module is `Android`, not `Bionic`.  The latter
is the Clang module, with no Swift overlay.

Author: al45tair

stdlib/public/Observation/Sources/Observation/CMakeLists.txt

@@ -32,7 +32,7 @@ add_swift_target_library(swiftObservation ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES} IS
   LINK_FLAGS "${SWIFT_RUNTIME_SWIFT_LINK_FLAGS}"
 
   SWIFT_MODULE_DEPENDS _Concurrency
-  SWIFT_MODULE_DEPENDS_ANDROID Bionic
+  SWIFT_MODULE_DEPENDS_ANDROID Android
   SWIFT_MODULE_DEPENDS_LINUX Glibc
   SWIFT_MODULE_DEPENDS_LINUX_STATIC Musl
   SWIFT_MODULE_DEPENDS_FREEBSD Glibc

stdlib/public/Observation/Sources/Observation/Locking.swift

@@ -23,8 +23,8 @@ import Glibc
 import Musl
 #elseif canImport(WinSDK)
 import WinSDK
-#elseif canImport(Bionic)
-import Bionic
+#elseif canImport(Android)
+import Android
 #elseif arch(wasm32)
 #else
 #error("Unsupported platform")