#71252 disable Atan2PiTest on Android x86 (#71382)

* #71252 disable AtanPiTest on Android x86

src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs

@@ -38,6 +38,7 @@ public static partial class PlatformDetection
         public static bool IsNetBSD => RuntimeInformation.IsOSPlatform(OSPlatform.Create("NETBSD"));
         public static bool IsAndroid => RuntimeInformation.IsOSPlatform(OSPlatform.Create("ANDROID"));
         public static bool IsNotAndroid => !IsAndroid;
+        public static bool IsNotAndroidX86 => !(IsAndroid && IsX86Process);
         public static bool IsiOS => RuntimeInformation.IsOSPlatform(OSPlatform.Create("IOS"));
         public static bool IstvOS => RuntimeInformation.IsOSPlatform(OSPlatform.Create("TVOS"));
         public static bool IsMacCatalyst => RuntimeInformation.IsOSPlatform(OSPlatform.Create("MACCATALYST"));

src/libraries/System.Runtime/tests/System/DoubleTests.cs

@@ -1486,7 +1486,7 @@ public static void Atan2PiTest(double y, double x, double expectedResult, double
             AssertExtensions.Equal(+expectedResult, double.Atan2Pi(+y, +x), allowedVariance);
         }
 
-        [Theory]
+        [ConditionalTheory(typeof(PlatformDetection), nameof(PlatformDetection.IsNotAndroidX86))]   // disabled on Android x86, see https://github.com/dotnet/runtime/issues/71252
         [InlineData( double.NaN,               double.NaN,          0.0)]
         [InlineData( 0.0,                      0.0,                 0.0)]
         [InlineData( 1.5574077246549022,       0.31830988618379067, CrossPlatformMachineEpsilon)]