Telephony: Modify code to check that PUK code length is always 8.

As per 3GPP TS 31.101 Release 11 section 9.6, the number of digits
for UNBLOCK PIN (PUK) is always 8.

Change-Id: I4ea69fd8e2e8e96330d10a67b2d1f5a1859c1016
Remove unused field from AssetManager.

This field was introduced in commit 4bdd33b81a17 but wasn't
used there (or since).

Change-Id: I0615e98b8990d42da6b85f8094ab19eb0465fd9e
Adding freeMemoryForTests static method to WebView.

This is going to be used by pagecycler tests.
Bug: b/10629847

(cherry picked from commit 54daaf1cffddad6366fac2ccfceb1e042dd8e90e)

Change-Id: Ie16a94baa15f868d60f3837290dcc8045aea31a9
Merge "Adding freeMemoryForTests static method to WebView."
Revert "Adding freeMemoryForTests static method to WebView."

This reverts commit c6a2a6e20f7ddd5a903e9395f6c574c316960694.

Change-Id: If9e1b3420ee239ab3166850e853d5949821f99e1
Merge "Revert "Adding freeMemoryForTests static method to WebView.""
Merge "Remove unused field from AssetManager."
Merge "Telephony: Modify code to check that PUK code length is always 8."