Bump xamarin-android-tools to be in sync with XA

Changes in xamarin-android-tools between 75530565b6aa903b3a0e52b61df4dd94475a19fc and 9e78d6ee586b498d0ea082b3bc00432c23583dd1:

9e78d6e (HEAD, origin/master, origin/HEAD, master) [tests] fix test failures on Windows (dotnet#47)
bdf0158 Better support no installed JDKs on macOS (dotnet#48)
6353659 Log what is happening during path selection (dotnet#46)
3ef860b Take BUILD_NUMBER into consideration for Version sorting (dotnet#45)
d3de054 Allow an optional locator to be provided to JdkInfo (dotnet#43)
917d3b3 Don't require quotes around `release` values (dotnet#41)
7427692 [tests] Unit tests for finding NDK location based on $PATH (dotnet#40)
dbc517b Merge pull request dotnet#38 from jonpryor/jonp-ndk-via-path
511d580 Allow finding NDK location based on $PATH
b42c217 [tests] Fix DetectAndSetPreferredJavaSdkPathToLatest() test (dotnet#37)
a4aad18 Add AndroidSdkInfo.DetectAndSetPreferredJavaSdkPathToLatest() (dotnet#35)
fae7e0a [tests] Remove temporary directories (dotnet#36)
07c4c2b [Xamarin.Android.Tools.AndroidSdk] Revert JDK validation (dotnet#34)

Author: radekdoulik