Fix Android support

Author: colemancda

Package.swift

@@ -27,17 +27,17 @@ let openCombineShimTarget: Target = .target(
     dependencies: [
         "OpenCombine",
         .target(name: "OpenCombineDispatch",
-                condition: .when(platforms: supportedPlatforms.except([.wasi]))),
+                condition: .when(platforms: supportedPlatforms.except([.wasi, .android]))),
         .target(name: "OpenCombineFoundation",
-                condition: .when(platforms: supportedPlatforms.except([.wasi]))),
+                condition: .when(platforms: supportedPlatforms.except([.wasi, .android]))),
     ]
 )
 let openCombineTarget: Target = .target(
     name: "OpenCombine",
     dependencies: [
         .target(
             name: "COpenCombineHelpers",
-            condition: .when(platforms: supportedPlatforms.except([.wasi]))
+            condition: .when(platforms: supportedPlatforms.except([.wasi, .android]))
         ),
     ],
     exclude: [
@@ -53,7 +53,7 @@ let openCombineFoundationTarget: Target = .target(
         "OpenCombine",
         .target(
             name: "COpenCombineHelpers",
-            condition: .when(platforms: supportedPlatforms.except([.wasi]))
+            condition: .when(platforms: supportedPlatforms.except([.wasi, .android]))
         ),
     ]
 )
@@ -66,9 +66,9 @@ let openCombineTestsTarget: Target = .testTarget(
     dependencies: [
         "OpenCombine",
         .target(name: "OpenCombineDispatch",
-                condition: .when(platforms: supportedPlatforms.except([.wasi]))),
+                condition: .when(platforms: supportedPlatforms.except([.wasi, .android]))),
         .target(name: "OpenCombineFoundation",
-                condition: .when(platforms: supportedPlatforms.except([.wasi]))),
+                condition: .when(platforms: supportedPlatforms.except([.wasi, .android]))),
     ],
     swiftSettings: [
         .unsafeFlags(["-enable-testing"]),

Sources/OpenCombine/CombineIdentifier.swift

@@ -9,7 +9,7 @@
 @_implementationOnly import COpenCombineHelpers
 #endif
 
-#if os(WASI)
+#if os(WASI) || os(Android)
 private var __identifier: UInt64 = 0
 
 internal func __nextCombineIdentifier() -> UInt64 {

Sources/OpenCombine/Helpers/Locking.swift

@@ -9,7 +9,7 @@
 @_implementationOnly import COpenCombineHelpers
 #endif
 
-#if os(WASI)
+#if os(WASI) || os(Android)
 internal struct __UnfairLock { // swiftlint:disable:this type_name
     internal static func allocate() -> UnfairLock { return .init() }
     internal func lock() {}

Sources/OpenCombine/Publishers/Publishers.Breakpoint.swift

@@ -5,7 +5,7 @@
 //  Created by Sergej Jaskiewicz on 03.12.2019.
 //
 
-#if !os(WASI)
+#if !(os(WASI) || os(Android))
 
 #if canImport(COpenCombineHelpers)
 @_implementationOnly import COpenCombineHelpers