Consider mScrollX when drawing the checkMarkDrawable

When mScrollX has a very large value the checkmark will not show,
unless it is considered when setting the bounds of the drawable.

Change-Id: Ic4c9bce950816686622baa7330ebb2e69ecfb8e6
Signal strength: add more checks to signal strength,

so it doesn't fall under the range of poor signal and automatically
assumes a gsm signal, actually checks if all values are true and not
valid then pass it on to lte or gsm. This fixes cases when gsm signal
is not valid and lte is active. When lte is active and shows a really
weak and gsm signal is not avalible due some broken vendor ril or
just running cdma lte and a few others senario creates this issue.

Change-Id: If9c5dc1a969605cd1eeb9218de02a9f8dbbd3ae1

Conflicts:
	telephony/java/android/telephony/SignalStrength.java
Revert "Signal strength: add more checks to signal strength,"

This reverts commit 003ea6ba8e85b22678afc424667f24b8ef400413.
Remove useless/repetitive code

fixScale(float) method has been extracted from the code but the original
code has been kept in place. Because of this, the animation scale is
"fixed" twice which is not necessary. This patch, simply call
fixScale(float) once and stores the result of it in the scale variable.

Change-Id: I50aeacbc2c13ebbf447506ae4309d50c0e313837