[tests] fix InstallAndroidDependenciesTest("GoogleV2")

[jonathanpeppers]

This test has started failing as soon as a platform-tools 36.0.0 appeared on Google's feed:

_AndroidSdkDirectory was not set to new SDK path C:\a\_work\1\a\TestRelease\03-28_03.15.36\temp\InstallAndroidDependenciesTestGoogleV2\android-sdk. Please check the task output in 'install-deps.log'
Expected: True
But was:  False

I'm guessing this is because it is still "preview":

<remotePackage path="platform-tools">
  <type-details xsi:type="generic:genericDetailsType"/>
  <revision>
    <major>36</major>
    <minor>0</minor>
    <micro>0</micro>
  </revision>
  <display-name>Android SDK Platform-Tools</display-name>
  <uses-license ref="android-sdk-preview-license"/>

As the .binlog shows:

Component Android SDK Platform-Tools r36.0.0 not present on the system
Component Android SDK Platform-Tools r35.0.2 not present on the system

And then the next build refuses to use the SDK, due to adb.exe missing?

ValidateAndroidSdkLocation: for locator=constructor param, path=`C:\a\_work\1\a\TestRelease\03-28_03.15.36\temp\InstallAndroidDependenciesTestGoogleV2\android-sdk`, result=False
ValidateAndroidSdkLocation: for locator=preferred path, path=``, result=False
Looking for Android SDK...
ValidateAndroidSdkLocation: for locator=all paths, path=`C:\Android\android-sdk`, found adb `C:\Android\android-sdk\platform-tools\adb.EXE`
...
ResolveSdks Outputs:
  AndroidSdkPath: C:\Android\android-sdk

If I change the GetCurrentPlatformToolsVersion() method to ignore entries with:

<uses-license ref="android-sdk-preview-license"/>

Then the test passes for me locally.

It seems reasonable to ignore "preview" versions of platform-tools for this test.