Can't build from checkout

Looks like there is a class format error int he build somewhere.
This can likely be fixed by specifying the java version to build with.

This is my entire output:

```
cx2s-bpappin:libaddressinput bpappin$ gradle clean install
WARNING: Dependency org.json:json:20090211 is ignored for debug as it may be conflicting with the internal version provided by Android.
In case of problem, please repackage with jarjar to change the class packages
WARNING: Dependency org.json:json:20090211 is ignored for release as it may be conflicting with the internal version provided by Android.
In case of problem, please repackage with jarjar to change the class packages
WARNING: Dependency org.json:json:20090211 is ignored for debugUnitTest as it may be conflicting with the internal version provided by Android.
In case of problem, please repackage with jarjar to change the class packages
WARNING: Dependency org.json:json:20090211 is ignored for releaseUnitTest as it may be conflicting with the internal version provided by Android.
In case of problem, please repackage with jarjar to change the class packages
WARNING: Dependency org.json:json:20090211 is ignored for debugAndroidTest as it may be conflicting with the internal version provided by Android.
In case of problem, please repackage with jarjar to change the class packages
:android:clean
:common:clean
:android:preBuild UP-TO-DATE
:android:preDebugAndroidTestBuild UP-TO-DATE
[... removed cruft for clarity ...]
:android:bundleDebug
:android:assembleDebug
:android:processDebugAndroidTestManifest
:android:compileDebugAndroidTestRenderscript
:android:generateDebugAndroidTestBuildConfig
:android:generateDebugAndroidTestAssets UP-TO-DATE
:android:mergeDebugAndroidTestAssets
:android:generateDebugAndroidTestResValues UP-TO-DATE
:android:generateDebugAndroidTestResources
:android:mergeDebugAndroidTestResources
:android:processDebugAndroidTestResources
:android:generateDebugAndroidTestSources
:android:compileDebugAndroidTestJava
:android:preDexDebugAndroidTest
UNEXPECTED TOP-LEVEL EXCEPTION:
com.android.dx.cf.iface.ParseException: bad class file magic (cafebabe) or version (0034.0000)
at com.android.dx.cf.direct.DirectClassFile.parse0(DirectClassFile.java:472)
at com.android.dx.cf.direct.DirectClassFile.parse(DirectClassFile.java:406)
at com.android.dx.cf.direct.DirectClassFile.parseToInterfacesIfNecessary(DirectClassFile.java:388)
at com.android.dx.cf.direct.DirectClassFile.getMagic(DirectClassFile.java:251)
at com.android.dx.command.dexer.Main.processClass(Main.java:704)
at com.android.dx.command.dexer.Main.processFileBytes(Main.java:673)
at com.android.dx.command.dexer.Main.access$300(Main.java:83)
at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:602)
at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:284)
at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166)
at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144)
at com.android.dx.command.dexer.Main.processOne(Main.java:632)
at com.android.dx.command.dexer.Main.processAllFiles(Main.java:510)
at com.android.dx.command.dexer.Main.runMonoDex(Main.java:280)
at com.android.dx.command.dexer.Main.run(Main.java:246)
at com.android.dx.command.dexer.Main.main(Main.java:215)
at com.android.dx.command.Main.main(Main.java:106)
...while parsing com/google/i18n/addressinput/common/AddressData$1.class
1 error; aborting

:android:preDexDebugAndroidTest FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':android:preDexDebugAndroidTest'.
> com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/bin/java'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 1.979 secs

```