spec/ruby/library/socket/addrinfo: skip the specs that uses SOCK_SEQPACKET on Android

SOCK_SEQPACKET seems not to be supported on Android

spec/ruby/library/socket/addrinfo/initialize_spec.rb

@@ -274,15 +274,17 @@ describe "Addrinfo#initialize" do
         end
       end
 
-      with_feature :sock_packet do
-        [:SOCK_SEQPACKET].each do |type|
-          it "overwrites the socket type #{type}" do
-            sockaddr = ['AF_INET', 80, 'hostname', '127.0.0.1']
+      platform_is_not :android do
+        with_feature :sock_packet do
+          [:SOCK_SEQPACKET].each do |type|
+            it "overwrites the socket type #{type}" do
+              sockaddr = ['AF_INET', 80, 'hostname', '127.0.0.1']
 
-            value = Socket.const_get(type)
-            addr  = Addrinfo.new(sockaddr, nil, value)
+              value = Socket.const_get(type)
+              addr  = Addrinfo.new(sockaddr, nil, value)
 
-            addr.socktype.should == value
+              addr.socktype.should == value
+            end
           end
         end
       end
@@ -448,28 +450,30 @@ describe "Addrinfo#initialize" do
       end
 
       platform_is :linux do
-        describe 'and the socket type is set to SOCK_SEQPACKET' do
-          before do
-            @socktype = Socket::SOCK_SEQPACKET
-          end
-
-          valid = [:IPPROTO_IP, :IPPROTO_HOPOPTS]
-
-          valid.each do |type|
-            it "overwrites the protocol when using #{type}" do
-              value = Socket.const_get(type)
-              addr  = Addrinfo.new(@sockaddr, nil, @socktype, value)
-
-              addr.protocol.should == value
+        platform_is_not :android do
+          describe 'and the socket type is set to SOCK_SEQPACKET' do
+            before do
+              @socktype = Socket::SOCK_SEQPACKET
             end
-          end
 
-          (Socket.constants.grep(/^IPPROTO/) - valid).each do |type|
-            it "raises SocketError when using #{type}" do
-              value = Socket.const_get(type)
-              block = -> { Addrinfo.new(@sockaddr, nil, @socktype, value) }
+            valid = [:IPPROTO_IP, :IPPROTO_HOPOPTS]
 
-              block.should raise_error(SocketError)
+            valid.each do |type|
+              it "overwrites the protocol when using #{type}" do
+                value = Socket.const_get(type)
+                addr  = Addrinfo.new(@sockaddr, nil, @socktype, value)
+
+                addr.protocol.should == value
+              end
+            end
+
+            (Socket.constants.grep(/^IPPROTO/) - valid).each do |type|
+              it "raises SocketError when using #{type}" do
+                value = Socket.const_get(type)
+                block = -> { Addrinfo.new(@sockaddr, nil, @socktype, value) }
+
+                block.should raise_error(SocketError)
+              end
             end
           end
         end