roll back net8 android bindings

Author: vaind

src/Sentry.Bindings.Android/Sentry.Bindings.Android.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net7.0-android;net8.0-android</TargetFrameworks>
+    <TargetFramework>net7.0-android</TargetFramework>
     <!-- BG8605 and BG8606 happen because there's a missing androidx.lifecycle dependency, but we don't need it here.  (The native Android Sentry SDK will use it if it exists.) -->
     <NoWarn>$(NoWarn);BG8605;BG8606</NoWarn>
     <SentryAndroidSdkVersion>7.1.0</SentryAndroidSdkVersion>