Fix tests for Android.

Test: ./run_tests.py --bitness 32
Test: ./run_tests.py --bitness 64
Test: ./run_tests.py --bitness 64 --host
Bug: None
Change-Id: I8746cdf3e5dd57603a2487b7d9b082b3cd8f8474

test/std/input.output/filesystems/fs.op.funcs/fs.op.permissions/permissions.pass.cpp

@@ -159,7 +159,7 @@ TEST_CASE(test_no_resolve_symlink_on_symlink)
         {perms::owner_all, perms::group_all, perm_options::remove},
     };
     for (auto const& TC : cases) {
-#if defined(__APPLE__) || defined(__FreeBSD__)
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__ANDROID__)
         // On OS X symlink permissions are supported. We should get an empty
         // error code and the expected permissions.
         const auto expected_link_perms = TC.expected;

test/std/input.output/filesystems/fs.op.funcs/fs.op.proximate/proximate.pass.cpp

@@ -72,7 +72,11 @@ TEST_CASE(basic_test) {
       {cwd, "a", ".."},
       {parent_cwd, "a", "../.."},
       {"a", cwd, "a"},
+#if !defined(__ANDROID__)
+      // Android tests are run via a RemoteExecutor, where the parent directory
+      // is a temporary directory with no fixed name.
       {"a", parent_cwd, "fs.op.proximate/a"},
+#endif
       {"/", "a", dot_dot_to_root / ".."},
       {"/", "a/b", dot_dot_to_root / "../.."},
       {"/", "a/b/", dot_dot_to_root / "../../.."},

test/std/input.output/filesystems/fs.op.funcs/fs.op.temp_dir_path/temp_directory_path.pass.cpp

@@ -112,9 +112,17 @@ TEST_CASE(basic_tests)
     {
         std::error_code ec = GetTestEC();
         path ret = temp_directory_path(ec);
+#if defined(__ANDROID__)
+        // Android has no globally writable storage and thus this API does not
+        // work without environment configuration.
+        TEST_CHECK(ec != GetTestEC());
+        TEST_CHECK(ec);
+        TEST_CHECK(ret == "");
+#else
         TEST_CHECK(!ec);
         TEST_CHECK(ret == "/tmp");
         TEST_CHECK(is_directory(ret));
+#endif
     }
 }