Replace KeyChainActivity placeholder UI with more polished dialog (1 of 5)

frameworks/base

    Extended KeyChain.chooserPrivateKeyAlias to allow caller to supply
    preferred choice to be selected in chooser. This allows Email
    settings to highlight the current choice when allowing user to
    change settings.
	keystore/java/android/security/KeyChain.java
	api/current.txt

    Implemented KeyChain functionality to pass host and port
    information to KeyChainActivity for display.
	keystore/java/android/security/KeyChain.java

    KeyChain now sends a PendingIntent as part of the Intent it sends
    to the KeyChainActivity which can be used to identify the caller
    in reliable way.
	keystore/java/android/security/KeyChain.java

    Moved .pfx/.p12/.cer/.crt constants to Credentials for reuse.
    Added Credentials.install variant with no value for use from KeyChainActivity
	keystore/java/android/security/Credentials.java

packages/apps/CertInstaller
    Source of extension constants now in Credentials
	src/com/android/certinstaller/CertFile.java

packages/apps/Browser
    Have browser supply host and port information to KeyChain.choosePrivateKeyAlias
    Tracking KeyChain.choosePrivateKeyAlias API change
	src/com/android/browser/Tab.java

packages/apps/Email
    Tracking KeyChain.choosePrivateKeyAlias API change
	src/com/android/email/view/CertificateSelector.java

packages/apps/KeyChain

    KeyChain now depends on bouncycastle X509Name for formatting
    X500Principals, since the 4 X500Principal formatting options could
    not format emailAddress attributes in a human readable way and its
    the most important attribute to display for client certificates in
    most cases.
	Android.mk

    Changing the UI to a dialog, make the activity style transparent.
	AndroidManifest.xml
	res/values/styles.xml

    Layout for chooser dialog
	res/layout/cert_chooser.xml

    Layout for list items in chooser
	res/layout/cert_item.xml

    New resources for dialog including comments for translators.
	res/values/strings.xml

    New dialog based KeyChainActivity. Now also shows requesting app
    and requesting server. Now can preselect a specified alias. New
    link directly to CertInstaller.

	src/com/android/keychain/KeyChainActivity.java

    Fix KeyChainTestActivity to work with TestKeyStore changes that
    were causing network activity on the UI to look up the name of
    localhost. Also track KeyChain.choosePrivateKeyAlias API change.

	tests/src/com/android/keychain/tests/KeyChainTestActivity.java

Change-Id: I07128fba8750f9a6bcb9c6be5da04df992403d69