AndroidManifest.xml:20: error: Error: No resource found that matches the given name (at 'theme' with value '@style/Theme.IAPTheme のエラー対応

UnityでAdMobを入れ直したからか、Android版をビルドするときに以下のようなエラーが出るようになっちゃいました。

CommandInvokationFailure: Failed to re-package resources.
/Users/wakepon/Library/Android/sdk/build-tools/23.0.2/aapt package --auto-add-overlay -v -f -m -J "gen" -M "AndroidManifest.xml" -S "res" -I "/Users/wakepon/Library/Android/sdk/platforms/android-24/android.jar" -F bin/resources.ap_ --extra-packages com.chartboost.sdk.unity:com.android.vending.billing:com.google.unity:com.unity.purchasing.googleplay:com.unity.purchasing -S "/Users/wakepon/projects/Solokus/Temp/StagingArea/android-libraries/GoogleAIDL/res" -S "/Users/wakepon/projects/Solokus/Temp/StagingArea/android-libraries/GooglePlay/res" -S "/Users/wakepon/projects/Solokus/Temp/StagingArea/android-libraries/common/res"

stderr[
AndroidManifest.xml:16: error: Error: No resource found that matches the given name (at 'value' with value '@integer/google_play_services_version').

AndroidManifest.xml:20: error: Error: No resource found that matches the given name (at 'theme' with value '@style/Theme.IAPTheme').

]
stdout[
Configurations:
 (default)

Files:
  AndroidManifest.xml
    Src: () AndroidManifest.xml

Resource Dirs:
Including resources from package: /Users/wakepon/Library/Android/sdk/platforms/android-24/android.jar
applyFileOverlay for drawable
trying overlaySet Key=app_banner.png
trying overlaySet Key=app_icon.png
applyFileOverlay for layout
applyFileOverlay for anim
applyFileOverlay for animator
applyFileOverlay for interpolator
applyFileOverlay for transition
applyFileOverlay for xml
applyFileOverlay for raw
applyFileOverlay for color
applyFileOverlay for menu
applyFileOverlay for mipmap
Processing image: res/drawable-xhdpi/app_banner.png
Processing image: res/drawable-ldpi/app_icon.png
Processing image: res/drawable-mdpi/app_icon.png
Processing image: res/drawable-hdpi/app_icon.png
    (processed image res/drawable-ldpi/app_icon.png: 97% size of source)
Processing image: res/drawable-xhdpi/app_icon.png
    (processed image res/drawable-mdpi/app_icon.png: 95% size of source)
Processing image: res/drawable-xxhdpi/app_icon.png
    (processed image res/drawable-hdpi/app_icon.png: 95% size of source)
Processing image: res/drawable-xxxhdpi/app_icon.png
    (processed image res/drawable-xhdpi/app_icon.png: 92% size of source)
    (processed image res/drawable-xhdpi/app_banner.png: 93% size of source)
    (processed image res/drawable-xxhdpi/app_icon.png: 93% size of source)
    (processed image res/drawable-xxxhdpi/app_icon.png: 91% size of source)
    (new resource id app_banner from xhdpi-v4/drawable/app_banner.png #generated)
    (new resource id app_icon from ldpi-v4/drawable/app_icon.png #generated)
    (new resource id app_icon from mdpi-v4/drawable/app_icon.png #generated)
    (new resource id app_icon from hdpi-v4/drawable/app_icon.png #generated)
    (new resource id app_icon from xhdpi-v4/drawable/app_icon.png #generated)
    (new resource id app_icon from xxhdpi-v4/drawable/app_icon.png #generated)
    (new resource id app_icon from xxxhdpi-v4/drawable/app_icon.png #generated)
]
exit code: 1
UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
UnityEditor.Android.PostProcessor.Tasks.TasksCommon.Exec (System.String command, System.String args, System.String workingdir, System.String errorMsg, Int32 retriesOnFailure)

対処

Plugins/Android/GoogleMobileAdsPlugin/AndroidManifest.xmlにある、

<!-- InAppPurchase Activity -->
<activity android:name="com.google.android.gms.ads.purchase.InAppPurchaseActivity"
    android:theme="@style/Theme.IAPTheme"/>

という部分をコメントアウトしたらビルドが通るようになりました。

AdMobで自社広告を出すときにアイテム課金に対する広告を入れられるとか、そんなんらしいので、その機能を使わないならコメントアウトしても大丈夫みたいです。