fix(android): fix ListView layout with header and footer only

[m1ga]

There is an issue with ListView sections that don't have a content and only a header and footer:

<Alloy>
	<Window>
		<ListView>
			<ListSection>
				<ListItem title="Item" />
				<ListItem title="Item" />
			</ListSection>

			<ListSection>
				<HeaderView>
					<View height="50" backgroundColor="#111">
						<Label>Section 2 : Header View - item height=0</Label>
					</View>
				</HeaderView>

				<ListItem height="0"/>

				<FooterView>
					<View height="25" backgroundColor="#444">
						<Label>Section 2 : Footer View</Label>
					</View>
				</FooterView>
			</ListSection>

			<ListSection>
				<HeaderView>
					<View height="50" backgroundColor="#111">
						<Label>Section 2 : Header View - no item</Label>
					</View>
				</HeaderView>

				<FooterView>
					<View height="25" backgroundColor="#444">
						<Label>Section 2 : Footer View</Label>
					</View>
				</FooterView>
			</ListSection>

			<ListSection>
				<FooterView>
					<View height="25" backgroundColor="#444">
            <Label>Section only footer View - no item</Label>
					</View>
				</FooterView>
			</ListSection>

			<ListSection>
        <ListItem title="Item from 4" />
        <ListItem title="Item from 4" />
				<FooterView>
					<View height="25" backgroundColor="#444">
            <Label>Section 4 only footer View - and items</Label>
					</View>
				</FooterView>
			</ListSection>

			<ListSection>
				<ListItem title="last Section Item 1" />
				<ListItem title="last Section Item 2" />
				<ListItem title="last Section Item 3" />
			</ListSection>
		</ListView>
	</Window>
</Alloy>

This PR will connect the footer top to the header bottom if there isn't any content:

Current workaround: add <ListItem height="0"/>

[hansemannn]

cc @prashantsaini1 can you review?

[cb1kenobi]

Tested on Windows. Fix works as advertised. Thanks!

[prashantsaini1]

I noticed a major issue in recent changes regarding layout updates. I raised this PR to fix it properly. Hopefully we can test it there.