Improve notification spam filter code.

- Follow coding style guidelines
- Replace dialog shown on click by adding the relevant information and
  the delete button to the item itself
- Minor layout tweaks
- Make the empty view more descriptive
- Add license headers

Change-Id: Ic685364087d6a093fdbb6a143a9c6ed78596b62b
Automatic translation import

Change-Id: I1f9fc1e3a15c77fd725c3cae8ab619199cdfe04a

Conflicts:

	res/values-ar/cm_strings.xml
	res/values-ca/cm_strings.xml
	res/values-cs/cm_strings.xml
	res/values-da/cm_strings.xml
	res/values-de/cm_strings.xml
	res/values-el/cm_strings.xml
	res/values-es-rXA/cm_strings.xml
	res/values-es/cm_strings.xml
	res/values-fi/cm_strings.xml
	res/values-fr/cm_strings.xml
	res/values-in/cm_strings.xml
	res/values-it/cm_strings.xml
	res/values-iw/cm_strings.xml
	res/values-ja/cm_strings.xml
	res/values-ko/cm_strings.xml
	res/values-ku/cm_strings.xml
	res/values-lt/cm_strings.xml
	res/values-pl/cm_strings.xml
	res/values-pt-rBR/cm_strings.xml
	res/values-pt-rPT/cm_strings.xml
	res/values-ru/cm_strings.xml
	res/values-si/cm_strings.xml
	res/values-sk/cm_strings.xml
	res/values-sr/cm_strings.xml
	res/values-th/cm_strings.xml
	res/values-tr/cm_strings.xml
	res/values-uk/cm_strings.xml
	res/values-zh-rCN/cm_strings.xml
Settings: Add option to scramble pin layout when unlocking (1/2).

Change-Id: I3e2c200a0a31d3c765831bc30280029a50c88051