Bulletproof CredentialStorage state handling

As noted by the class javadoc, CredentialStorage has seen the number
of cases to cope with grow. This change tries to address those cases.

	src/com/android/settings/CredentialStorage.java

Added ChooseLockSettingsHelper.EXTRA_KEY_PASSWORD to coordinate
additional producer and consumer.

    constant declaration here, since its used by callers of
    ChooseLockSettingsHelper.launchConfirmationActivity
	src/com/android/settings/ChooseLockSettingsHelper.java

    old producer
	src/com/android/settings/ConfirmLockPassword.java
    new producer (CredentialStorage wants passwords and patterns)
	src/com/android/settings/ConfirmLockPattern.java
    new consumer
	src/com/android/settings/CredentialStorage.java
    old consumer
	src/com/android/settings/CryptKeeperSettings.java

Made class final and removed protected from method to make it clear
ChooseLockSettingsHelper is not to be used by subclassing.

	src/com/android/settings/ChooseLockSettingsHelper.java

Change-Id: Ib2d65398fe44573168a6267a0376c3b0388b16c8

1 files changed, 6 insertions, 1 deletions

diff --git a/src/com/android/settings/ConfirmLockPattern.java b/src/com/android/settings/ConfirmLockPattern.java
index 0653d3f7a..289293098 100644
--- a/src/com/android/settings/ConfirmLockPattern.java
+++ b/src/com/android/settings/ConfirmLockPattern.java
@@ -256,7 +256,12 @@ public class ConfirmLockPattern extends PreferenceActivity {
 
             public void onPatternDetected(List<LockPatternView.Cell> pattern) {
                 if (mLockPatternUtils.checkPattern(pattern)) {
-                    getActivity().setResult(Activity.RESULT_OK);
+
+                    Intent intent = new Intent();
+                    intent.putExtra(ChooseLockSettingsHelper.EXTRA_KEY_PASSWORD,
+                                    LockPatternUtils.patternToString(pattern));
+
+                    getActivity().setResult(Activity.RESULT_OK, intent);
                     getActivity().finish();
                 } else {
                     if (pattern.size() >= LockPatternUtils.MIN_PATTERN_REGISTER_FAIL &&